Keapo Lets Users Buy and Sell Items
Keapo is a free app for buyers and sellers who are looking for something to, well, buy or sell. The app creators say that it shouldn't take much longer than 25 seconds to have your app listed on Keapo and social network sites, such as Facebook and Twitter. It lets sellers take pictures through the app, write a summary, and set a price before listing it on Keapo.
Buyers are able to contact the seller directly through mobile or email and can ask more details and negotiate the asking price before buying the item.
I guess I know where to look the next time I want to buy a SNES!