Yeah, as bizarro-world as the corporate and financial side of it seems, I don't hate the general idea. I used to sell old hardware and other misc stuff on eBay, but these days I just don't have the time or motivation to deal with it, even if old stuff continues to accumulate. I'd be happy to pay some amount of overhead to make most of the selling process and verification someone else's problem and have a reverse-layaway distributed pawnshop I could drop stuff off at.
That said, I'm sure there are a dozen startups that probably did exactly what I'm asking, and then failed because of some obvious problem with the concept that I'm not thinking about.