Fabs that second chance offer is a scam for certain. Email and tell the guy the winners bids should all be cancelled as he wasn't willing to buy at all. That way your highest bid of 900 bucks is what you are willing to pay...otherwise you will report him to ebay for scamming. Also seems as though he had a shill bidder and let him know ebay will be contacted.
As Rocky said..I sell quite a few items on ebay and buy a few myself...but I am very careful about emailing people. I only do it through their(ebay's) ask seller a question link. No info is passed to them that way. Most of the items for sale on ebay are legit but you still have to be careful. When I sell items I always charge exact shipping charges as some will charge more than necessary to make back their ebay and paypal fees....which is a kind of ebay legal scam....although a small one.