Is a used Sony A7C II worth buying over a new Canon R8?

Yes—if the used Sony A7C II is in excellent condition and not much more expensive, it is usually the more rounded long-term buy than a new Canon R8. Pick the A7C II for in-body stabilization, higher resolution, compact travel use, and access to Sony’s broader E-mount lens ecosystem. Pick the new Canon R8 if warranty, Canon ergonomics/colors, lower upfront cost, or full-frame video/photo performance for the money matter more than stabilization.

My practical call: buy the used A7C II only if you can verify condition, shutter count, clean sensor/EVF/LCD, no impact damage, battery health, included accessories, return window, and that the price meaningfully beats buying it new. If the used Sony is only slightly cheaper than new, the new Canon R8 becomes safer value because you get a warranty and no used-gear risk.