Had a family member that used Mercari to sell a ton of stuff, but the setup looked quite sketchy to me, and didn't seem to have the same amount of protections as eBay for buyers or sellers. eBay is still my number one look-to place for rare stuff, then Craigslist. But I don't own any video games anymore, just the mini consoles, so I can't speak for video games specifically. It's interesting to look back and see how eBay has stayed consistently there over the years. I prefer it to Amazon which has become this tech giant.