I need marketplace extention for a magento

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I need a marketplace extension for magento. I want that seller signup on my site and add his product and also seller can maintain his profile as well.
When anyone purchase the seller's product then an email goes to that seller containing products details and seller can also update order shipping status.
Please bid if you already have the any kind of solution which provide me above facility. I son't have time to develop whole thing. Please write magento in your description so I know that you read my specification.

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