Add-on Downloadable Resource Sales addon for Members



i am looking for a addon where members can add their own downloadable recources for selling.
The thing should be on a commission basis, so the members get the opportunity to sell their stuff on my community and receive a certain percentage of the. sales proceeds. The system should be able to work with the payment gateway available in the system.

I have take a DBTech eCommerce, but as i saw the system doesn't support resource file uploads.

Do you guys any suggesions ?