Best Used Mirrorless Cameras: Which Older Models Are Still Worth Buying
If you want a full-frame mirrorless body for less than a current model, three older bodies are worth comparing first: the Sony α7 III, the Canon EOS R6 and the Canon EOS R6 Mark II. The right one depends mostly on your lens mount, whether you shoot fast action, and what the seller includes. This list is short on purpose: we only list models whose specifications we have read in the manufacturer’s own documentation, and we will add more as we do.
Models at a glance
-
Sony α7 III
Sony E-mount · full frame
- 2018announced
- 24.2effective MP
- 200,000rated shutter (Sony JP)
-
Canon EOS R6
Canon RF mount
- 2020announced (US)
- 20.1effective MP
- n/crated shutter not confirmed
-
Canon EOS R6 Mark II
Canon RF mount
- 2022announced (US)
- 24.2effective MP
- n/crated shutter not confirmed
Illustrations show the product type, not the specific model. Figures are the manufacturers’ published specifications for new units; “n/c” means we did not find an official figure.
Good fit if
- You want a full-frame body and are comfortable buying used.
- You already own, or plan to buy, lenses for Sony E or Canon RF.
Not a fit if
- You need the newest autofocus or video features — check current models first.
- You do not want to check the seller’s photos, description and return terms yourself.
The three bodies at a glance
| Sony α7 III | Canon EOS R6 | Canon EOS R6 Mark II | |
|---|---|---|---|
| Mount | Sony E | Canon RF | Canon RF |
| Effective pixels | 24.2 MP (highest in this row) | 20.1 MP | 24.2 MP (highest in this row) |
| Top continuous speed | 10 fps | 12 / 20 fps | 12 / 40 fps (highest in this row) |
| Card slots | 2 slots | 2 slots | 2 slots |
| Weight | 650 g | 680 g | 670 g |
Official specifications as printed by Sony and Canon, shortened to the numbers: MP = effective megapixels; fps = shots per second (Canon: mechanical / electronic shutter); weight is with battery and card. The highest value in a row is highlighted. Battery figures use each maker’s own test conditions and lenses, so they are not directly comparable between brands.
Used flagship or new entry-level?
A common choice is an older high-end body versus a brand-new entry-level one at a similar budget. Specifications can’t settle this alone; these are the questions that usually do:
- Lens mount first. Bodies and lenses must match (Sony E vs Canon RF). Buying into a mount you will outgrow costs more than any body saving.
- Condition risk. A new body has a full return window and manufacturer warranty from the seller; a used one has only what the listing states. Read the return terms and any warranty on the specific listing.
- What the listing includes. Many used bodies come without a battery charger, strap or card. Add those to the price before comparing.
- Features you will actually use. Compare burst speed, card slots and battery life from the table above against the entry-level model’s official specs.
Which one to look at first
- Choose the Sony α7 III if you are in, or moving to, the Sony E-mount system and want two card slots (Sony’s battery figures use different test conditions from Canon’s, so don’t compare them directly).
- Choose the Canon EOS R6 if you are in the Canon RF system and want fast bursts without paying for the Mark II. See the R6 vs R6 Mark II comparison.
- Choose the Canon EOS R6 Mark II if higher resolution, a faster electronic shutter and better listed battery life matter more than saving money.
Before you click
Run through the used camera checklist. Search results for any body often include “for parts or not working” items, empty boxes and accessories — these are not working cameras. Model-specific notes: Is a used Sony α7 III still worth buying?
Current listings
We have not joined the eBay Partner Network yet, so links to eBay on this site are plain links and we earn nothing from them today. We may earn a commission in the future if we join.
We don’t show individual listings, prices or stock here: they change by the hour and we haven’t checked any. Current listings are on eBay — the buttons below open an eBay search limited to Buy It Now items (remove that filter on eBay to see auctions).
- Search used Sony α7 III
See available listings on eBay - Search used Canon EOS R6
See available listings on eBay - Search used Canon EOS R6 Mark II
See available listings on eBay
Search results can include items for parts, empty boxes and accessories. Seller descriptions are the seller’s own statements; we have not verified them.
Related guides
- Is a Used Sony α7 III Still Worth Buying?
- Canon EOS R6 vs R6 Mark II (Used): What You Gain by Paying More
- Used Camera Buying Checklist: What to Confirm Before You Buy on eBay
Sources and method
Facts are labeled by type. Manufacturer figures are for new products as documented by the maker; they are not measurements of any used item, and we did not buy, use or inspect these products. Reviewed 2026-11-06. See How We Evaluate.
- Sony α7 III Help Guide — Specifications — Official specification
- Sony α7 III Help Guide — Battery life — Official specification
- Canon EOS R6 Online Manual — Specifications — Official specification
- Canon EOS R6 Mark II Online Manual — Specifications — Official specification
- Questions to weigh: used vs new — Our analysis
PreOwnedPick is not eBay and does not sell, inspect, repair or warrant items. Prices, availability and terms are set by sellers and eBay.