@marckohlbrugge Hey Marc. Good question. As with these sorts of things, the more people on the app, the more likely it will be for users to match. However, we do believe that the likelihood of users matching to be pretty high. From the Discovery Feed, users can flip through all the available items other users have uploaded, finding things they like. But more than just that, users can go through each other's entire inventories via their profiles. We expect, and encourage, users to upload multiple items -- because the truth is, you'd be surprised what people would be willing to trade you for the things you're willing to give up.

So while you may very well find an iPad in exchange for your iPhone, you may instead find an iPad in exchange for your leather jacket. Or for your old bicycle. Or you may not get an iPad for your iPhone, but get something else that it turns out you’d really like. In the end, you decide which bandies you want to complete, and which you don’t. And if you don’t, you can always counter trade offers with your own, negotiating item pairs until you’re both happy.

In the beta, the matching will be simple. However, we do plan on continually tweaking the algorithm. We plan on eventually allowing users to combine items — for example, my two items for your one item — as well as matching users in groups. Group trading greatly increases the probability of trade occurrence. You give me your iPhone. I give Sarah my guitar. She gives you her iPad. The goal is to make the likelihood of trading as probable as possible.

I hope this answers your question… please let me know if you have any others :)