It sounds a little like Needish or Redbeacon. You ask for what you want/need and then people/companies make you offers for it. Sort of a reverse eBay.

I don't know how Redbeacon is doing, but I know Needish didn't do very well, maybe because of the market they targeted, but they ended doing a clone of Groupon and then selling it to Groupon to build Groupon Latam.