That being said, I don't think the concept is as bad as others are making it out to be. As a college student, I know TONS of people who sell everything from textbooks to notes (might be a good pivot). Problem is, with the introduction of groups for universities, we have preset groups for stuff like this.
One thing I am worried about is a potential spam to groups that I'm in, which would only make me resent your project.
Good luck!
Since you are a student, would you mind if I contacted you for testing this among your friends? When you say a group exists, does that mean a groups outside of facebook?
And the student groups link: http://www.digitaltrends.com/social-media/facebook-refocuses...
Sorry for the crappy article, it's what Google brought up!
Though I m curious about few things. You have a webapp, an iphone and a windows app. Thats a lot of development (correct me if I am wrong). How much effort did it take (team size and timeframe) to get this done. If you are fine sharing.
I don't even understand the idea of selling to friends - what are the chances of them wanting to buy it? It's such a small demographic compared to what you get on CL or Ebay.
I think you're solving a problem that doesn't exist, and you've convinced yourself that you are solving a problem.