So... I won an eBay ad and paid for the timeshare. Not much. Fine with losing my payment. I did sign the paperwork for purchasing the timeshare, but I've realized I don't want to go ahead with the purchase. They are waiting for me to send back notarized paperwork for transferring the deed to my name, but I told the seller I no longer want to make the purchase. They said I would have to pay them $700 for the closing costs if I back out. Any advice?