In short
- The shutter count declared by the seller is not enough: without laboratory certification, it is just a word.
- The sensor is the most expensive part of the camera: a spot not seen at purchase can cost 800-2500 euros to replace.
- Buying without warranty from a private seller means you pay for every hidden defect — and the most common defects emerge after weeks.
- The real value of your gear lies in the lenses, not the body. Getting the proportion between the two wrong is the mistake that weighs the most over time.
I'm Matteo, and in ten years at ReflexMania I've seen thousands of used cameras come and go. I've seen people make incredible deals and others turn a 200-euro saving into a 1,000-euro repair bill. The difference isn't luck — it's five questions you ask (or don't ask) before you pay.
In this guide, I share the five most common mistakes I see when buying used photography equipment, why they are costly, and how to avoid them. This applies whether you are buying in-store, from a private seller, or simply considering your next purchase.
Mistake 1: Trusting the declared shutter count
The shutter count is the mileage of your camera. It indicates how many times the mechanical shutter has been actuated and, consequently, how much the camera has actually been used. Every model has a declared lifespan by the manufacturer:
- Entry-level: approx. 100,000 shutter count
- Semi-professional: 150,000-200,000 shutter count
- Professional: 300,000-500,000 shutter count
The problem is that the shutter count on a camera in front of you is not visible. It must be read. And a private seller who tells you "it has few" — without proof — is making a claim for which no one is accountable.
How it is actually verified
The shutter count is written in the EXIF data of every photograph. For most brands (Canon, Nikon, Pentax, Sony), there is free software available to read it:
- EOSInfo / ShutterCount for Canon
- myShutterCount.com (online, supports various brands by uploading an image)
- OpannaEXIF for Nikon
Load a JPG photo you just took, and in two seconds you see the exact number. If the seller doesn't allow you to take a photo with the camera before purchase, or doesn't send you a recent photo for verification, it's a red flag.
What we do
On every camera that enters our workshop, the shutter count is measured and certified on the product sheet. For example, a Canon EOS RP we currently have for 600 euros has a certified shutter count of 15,000: a verified figure, not an estimate. Given how we buy used equipment, this is the first thing we want to see before setting a price. It is also the first thing a buyer should look for.
Error 2: Ignoring the sensor's condition
The sensor is the most delicate and most expensive component of a camera. Dust, oil spots, scratches on the filter: each of these defects ruins every single photo you take with that machine, until you resolve the issue. And the resolution, in some cases, costs more than the camera itself.
The problem is that a dirty or damaged sensor is not visible in photos taken with wide apertures (f/2.8, f/4). Defects only become visible when stopping down to f/16-f/22, as the increased depth of field brings the particles on the sensor into focus. This is why many buyers only notice the issue after weeks or months of use.
The test anyone can do
- Set the camera to aperture priority (Av/A)
- Close down to the maximum: f/16 or f/22
- Focus manually on infinity
- Take a photo of a uniform white surface: A4 sheet, wall, overcast sky
- Open the photo on your computer and increase the contrast to the maximum
If the photo is uniform, the sensor is clean. If you see dots or dark spots, there is dust. If you see lines or elongated marks, the filter is scratched.
What costs what
| Detected defect | Repair cost | Resolvable? |
|---|---|---|
| Dust on the filter | 30-50 € | Yes, professional cleaning |
| Oil stain | 60-120 € | Yes, specific wet cleaning |
| Scratched filter | 300-500 € | Filter replacement only |
| Damaged sensor | 800-2500 € | Sensor replacement only |
Translated: a dust spot is a triviality, a scratch on the filter is a half-tragedy. The difference between the two, to the eye, is invisible. That is why the test must be done before paying. If you have doubts about how to handle the sensor, we discussed it in detail in the guide on how to clean your camera sensor.
Error 3: Buying without a warranty
This is the most expensive option overall, even though it may seem like the best deal at first glance. When you buy from a private seller on Subito, Facebook Marketplace, or eBay, you are taking a gamble: that the camera body is exactly as described and that no defects will emerge in the months that follow.
The defects that surface after buying from a private seller — the ones I see come across the counter almost every month — are these:
- Front/back focus: the autofocus focuses one centimeter in front of or behind the selected point. Subtle because it is not immediately noticeable, destructive in portraits
- Dead pixels on the sensor: appear as fixed colored dots, visible especially in long exposure
- Shutter count near end of life: works until it breaks, without warning
- Moisture ingress: internal corrosion that worsens over time, telltale symptoms
- Deteriorated IBIS: after drops or impacts, stabilization works poorly without external signs
- Bulging battery: growing problem with older camera bodies, potentially dangerous
The cost of these repairs ranges from 150 to 600 euros depending on the issue. On an 800 euro purchase, that is a huge portion of the price paid.
The 2-year warranty we apply to all used equipment is not a commercial detail: it is the essence of buying from a specialized store. We discussed this in depth in the article dedicated to why the warranty on used gear makes a difference.
Mistake 4: Focusing on the camera body instead of the lenses
This is the truth few sellers openly admit: the camera body depreciates quickly, while lenses retain their value. A good Canon, Nikon, or Sony lens from ten years ago is still worth 60-70% of its original price today. A camera body from ten years ago is worth 15-20%.
The practical consequence: the best strategy for any budget is to invest more in lenses than in the camera body.
Concrete example
You have 1,200 euros to spend. Two possible paths:
| Strategy | Body spend | Lens spend | Photographic result |
|---|---|---|---|
| Wrong | 1000 € (top body) | 200 € (kit lens) | Mediocre |
| Right | 500 € (solid body) | 700 € (serious lens) | Excellent |
With 500 euros today you can get a Sony A7 Mark II Full Frame or a well-maintained Sony ZV-E10 APS-C. With 700 euros, invest in a good f/2.8 standard zoom or a high-quality prime lens, and you will keep those lenses in your bag for ten years. You will replace the camera body before that.
If you are completely changing your gear, consider a trade-in: the value of the equipment you sell is deducted from the new purchase. We explain how it works in the guide on how to sell your used photographic equipment.
Mistake 5: Not considering the lens system before choosing the body
When you buy your first camera body, you are not simply buying a machine: you are entering an ecosystem. The lenses you will acquire over the years will only be compatible with that system (with exceptions and adapters, which still have limitations).
Switching systems later is painful. It means selling everything at a loss and repurchasing at full price. A complete system migration typically costs a net 300-800 euros in depreciation and replacements.
Questions to ask yourself before choosing the body
- Do you already have lenses? If so, start with the system that mounts them (possibly with an adapter: Canon EF→RF, Nikon F→Z, Sony A→E)
- What type of photography will you do? Sports and wildlife require a rich range of telephoto lenses — here Sony E and Canon EF/RF are the safest choices. Portrait and landscape are well covered by all systems
- How much do you want to spend on lenses? If the budget is limited, Sony E offers the largest number of third-party options (Sigma, Tamron, Samyang) at competitive prices
- Work or passion? For serious professional use, also consider the availability of certified technical support in your area
For an in-depth systematic comparison, we have dedicated an article to Canon vs Nikon vs Sony. And if you are considering the switch from DSLR to mirrorless, also read DSLR vs mirrorless in 2026 and how to choose your first used mirrorless.
The five errors in a table
| Error | Average cost if wrong | How to avoid |
|---|---|---|
| Unverified shutter count | 200-400 € | EXIF reading software / lab certification |
| Untested sensor | 300-2500 € | f/16 test before paying |
| Purchase without warranty | 150-600 € | Specialized shop, 2-year warranty |
| Body/lens imbalance | 500-1000 € in residual value | Invest 50-60% of budget in lenses |
| Wrong system | 300-800 € per migration | Think about 3-5 years of purchases, not just the first one |
What we check at our workshop
For those wondering what the difference is between a used item sold by a private seller and a certified used item, here is what goes into the process before a camera body is listed in our catalog:
- External inspection: body, dials, buttons, display, mount, hot shoe
- Sensor test: shots at all apertures, dust and scratch check
- Autofocus test: precision on dedicated targets, calibration if necessary
- Shutter test: certified shutter count + operation check at all speeds
- Stabilization test: IBIS/OIS verification at various focal lengths if present
- Professional cleaning: sensor, mount, electrical contacts
- Firmware update: latest available version
- Cosmetic condition documentation: honest description, photos of all details
Only when every point has been verified is the camera body put up for sale. This is why a certified used camera costs 10-15% more than a private sale — and why customers who buy from us come back.
Frequently Asked Questions
How reliable is the shutter count declared by the seller?
Only if it is verifiable: either through EXIF reading software on a recent photo provided by the seller, or because it is certified by a specialized laboratory. A verbal declaration, on its own, is not worth much. The good news is that verification takes two seconds if the seller sends a recent JPG photo.
How do I distinguish dust from a scratch on the sensor?
Dust appears as small, scattered, round specks. Scratches appear as elongated, linear marks, always in the same position. Dust can be removed with 30-50 euros of professional cleaning; a scratch on the filter requires component replacement, costing 300-500 euros.
Is it always better to buy from a specialized store than from a private seller?
For those who know what to check and are willing to accept the risk, buying from a private seller can lead to good savings (10-15%). For first-time buyers or those seeking long-term peace of mind, a specialized store offers warranty, certification, and the right of return. Overall, buying from a private seller without experience often costs more.
How much budget should I allocate to the camera body and how much to the lenses?
The practical rule is 40-50% for the camera body, 50-60% for the lenses. If you are starting out, it is better to buy a solid camera body from one or two generations ago and invest the difference in a serious lens: image quality benefits from this, and you will keep the lenses for many years even if you change camera bodies.
Can I switch between systems without any loss?
You always lose something, typically 300-800 euros between the depreciation of the sold equipment and new purchases. To reduce the loss, sell via trade-in at a specialized store (the value is deducted directly from the new purchase, no selling commissions) and use adapters where possible to reuse the lenses from your old system.
What are the red flags when negotiating with a private seller?
Three in particular. First, the refusal to send recent photos taken with the camera (a JPG is requested, not a video). Second, the lack of the original box, receipt, or purchase invoice. Third, haste in the sale or pressure to close immediately without time to verify. Even just one of these signals is a reason to stop.
Need advice before making a purchase?
If you are considering a used camera — even from a private seller, even outside our catalog — and you are unsure what to check, contact us. We offer free advice because we are photographers first, sellers second, and because a customer who makes a poor purchase, even elsewhere, is a customer who likely will not return to photography.
Three ways to get in touch:
- Contact form — response within 24 business hours
- WhatsApp at 342 362 3454 (messages only)
- Phone: 071 291 6347 (Mon-Fri 9-13/15-18, Sat 9-13)
If you want to see what we have in stock right away, explore the available used gear today: every camera is certified, comes with a 2-year warranty, and ships within 24-48 hours.
Article written by Matteo for the ReflexMania Team. Last updated: May 2026. Prices and availability refer to the time of publication.