What is the best shopping script?

Question by rookie: What is the best shopping script?
Hello,

I’m looking for a shopping script, but not just regular cart.
I need that user could sell his own items, like on http://www.istockphoto.com

I wonder what script do they use?

Thanks

Best answer:

Answer by Rosa P
You can get it cloned by some web developer from website like http://definitivelab.com/ .

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