haha welcome to the high stakes world of buying drums on ebay.. the endless checking and fretting about whether someone will overturn your bid or not..
i've realised that the bids tend to shoot higher during the last 24 hours, so its kinda better that you hold your horses till then. no point bidding with 4 days remaining and worrying about it the entire 4 days.
my adventures on ebay have so far resulted in a late 70s supraphonic(with case, stand and some shell pitting) for USD$200.