You have a good point. The "thanks" are from the selling side of the transaction.
And in most cases, I'm buying not selling.
For the chips I'm interested in, I'm hoping that the auction is overlooked and I can "steal" it for a low price.
And yes, I've had my high bids pushed up at the last moment by another bidder too.
So I know what it feels like from both perspectives!

Mostly I try to decide what I'm willing to pay, and bid that amount, rather than get into a heated competition with someone else.
If I win, fine. If not, I'll try again on another chip.