1 bid retraction within the last couple months. I accidently, instead of hitting the period/dot button on my number keypad, hit the 3 instead.
Admittedly, I did it in a hurry and didn't double check before I confirmed, but I ended up bidding $10,397 instead of $10,97.
I immediately retracted the bid, stated the reason why then rebid the correct amount.
As to Andy's question, I have asked that numerous times without ever receiving an answer? I always wondered/wanted to know, if the seller refuses to cancel the sale, are you obligated to purchase the card?
I assume, as nobody can force you to pay, that you'd be left with negative feedback, but is there anymore to it than that?