i just won an auction, and there was a mysterious thirty pound jump in the bidding just before the end. Even when checking the bid history for automatic bids that gap was still there after a whole series of incremental increases. No reserve was advertised on the item. And there is another auction going on right now from this same (top-rated plus) seller in which exactly the same thing happened, and it was that same amount, thirty pounds. Incremental bidding has continued after the jump. No reserve warning on this one either. What gives? if there is a reserve, shouldn't that always be apparent? is there a way for people to bid invisibly?