penny auction script needed / swoopo alike by sisincorp88

I need a script that does penny auctions. similiar sites like www.quibid.com, www.swoopo.com. Please give suggestions. Are you developing the script yourself or do you have existing script. If you have existing script, please provide a demo and give details... (Budget: $30-250, Jobs: Javascript, PHP, Social Networking, Software Architecture, SQL)
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