I paid $300 for a GoPro that costs $400 new. After less than 10h of utilization it started leaking water. I did not realize it at first so I blamed it on the battery, which I replaced. When I confirmed the problem was actually a leak, I had owned the GoPro for a bit more than 1 year (I just use it to snorkle a couple hours during my vacations) and Back Market said the best they could do was to give me 5% on my next purchase. I will never purchase from them again. If you purchase from Back Market, assume what you buy will stop working shortly after the warranty expires and ask yourself if 1 year of usage justifies the ~25% drop in price compared to a new one. To me it clearly does not.