Proxibid is terrible do not use their site! They do not care about the bidder at all!
I have bid over $10,000. In 2011 and after several issues with items i had bids in for and did not win when i should have i will not use proxibid ever again. I have waited hours several time for item i was wishing to bid on and then something mysterious happens and the system is down or my bid does not register or some other ridiculous reason my bid was not acknowledged.
They will always tell you there was a technical problem and the auction house will tell you it was proxibids fault.
I recommend that no one should use this site if you care about being treated fairly!