[TheGRS]

I interviewed at a place that had their own collectible card market, I think they partnered with eBay. But the whole service was that you would yield your valuable cards over to them and they would store them in a repurposed bank vault for safe keeping or to act as a seller. Cards that were like $1k or more.

They seemed to be doing really well esp with all the pokemon and MTG card crazes going on.

[jonlucc]

This is part of the value prop of TCGPlayer, which was bought by eBay. They're specifically a marketplace for trading cards. Like Amazon, sellers can keep their product and sell it through the site, they can ship their inventory to TCGPlayer to manage logistics, and TCGPlayer sells cards on their own.