I think it's an interesting idea only in that it seems to be a case of throwing a whole bunch of stuff at the wall and seeing if any of it sticks. It allows yo

I think it's an interesting idea only in that it seems to be a case of throwing a whole bunch of stuff at the wall and seeing if any of it sticks. It allows you to do a whole bunch of things, none of which I want to do. You can sell/buy stuff, but as others have mentioned evaluating quality seems like a huge problem. You can make a list of all the stuff you own and find out what it's worth, but since that's an awful lot of effort and all my stuff is worth less than I paid for it, why would I want to? You can tell everybody about all the stuff you own, but that just seems kind sad. And you can ask people about the stuff they own, but there are plenty of online review systems which make getting the opinion of random people easier. But of all these services, there might be something that's of interest to some subculture somewhere. Maybe obsessive stamp collectors, or obsessive [something] collectors will find one or more of these features to actually be useful, and that might be enough to build a business on.