Module which allows the users to create account and sell their product

[Jdtribe]

Hi,

I am very very new to oscommerce and perhaps I should do some search before asking questions here, but if there is anyone who dont mind answering, please let me know if there is a module (like ebay) which allows the users to create an account and sell their products for a fixed price or in an auction fashion.

 

Thanks for your time.