Hi guys

I'm very new to Android although I have been doing development work for a long time now. I have a website with virtual currency, and I would like people to be able to redeem their virtual currency for Android applications that some friends of mine have made.

It seems to me that I actually need to implement a basic application store, but I am not sure how to go about doing this. If anyone could point me in the right direction, it would be much appreciated.