System of auctions module (request)

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Hy !

I have a request... but I don't know if is possible.
I want a system of auctions for MyPlaza.

That is, a system of auctions for users to can bought sundries objects (like caps, jumpers, clocks... or any another object).
But I shall as his auction is on a certain period .
When limit of time for auction it's off, user which pays more, gain the object.
Also, will be interesting if just certain class of users can participate to auction. Or if they have possibility to buy privilege to auction.

I hope you understanding what I want...

Sorry for my bad english.