Was it an email from FastRobPlus directly? He used to be on this board but left sometime ago never to post again. (Not sure of the story, but he seemed to be a nice guy...).
If it is, it could be the high bidder didn't want to pay, and he didn't want to go through the trouble of re-listing. But, if it isn't the original seller then I'd stay far away, as it's probably a scam.