Hi, I'm looking for a way to setup a shopping cart with the possibility of choosing your own payment. The thing is that those who want this are in need of a minimum price. They have a EP they want to sell online. It contains of 5 or 6 songs (mp3 files) What they wanna do is to sell the entire EP for 5$ dollar minimum, but with the possibility of paying more for those who wants to. They also want the single songs to sold for $1 minimum, but with the posibility of paying more.

In other words. What I'm looking for is a way to find a shopping cart where the user can choose his own price over the minimum price and with some kind of confirmation that give the buyer the possibility to download the item.

Hope someone can help me on this issue.