Drupal Site simlar to iStockphoto.com?

Hi all,

I'm a graphic designer looking to hire a drupal developer for a website. I'll cover the theming and what-not, but I need some backend work.

Basically, I want a site that is simlar to iStockphoto.com, but not with stock photos. It will be a specific type of file with multiple thumbnail previews (seperate thumbnail uploads, no automatic thumbnail generation needed).

In a nutshell:

1) users may create accounts
2) authenticated users may upload files and set a price
3) authenticated users will be able to download the file and pay the specified price
4) when the file is purchased, the funds are deposited into the seller's paypal account
4) the webmaster needs to be able to track downloads and automatically collect a percentage of the sale somehow

Questions, comments, quotes?

klucid: graphic design