I am going to split hairs per Slim's remark that there's no such thing as overbidding.
As you know, I love a good overbidding thread, and believe there are far too few of them, so I feel it's my duty to contribute to them when one finally is posted.
If CI sells a box of cigars for $60 and they are in stock, and you 'win' that same box on auction at C-bid for $65, you overpaid. If you want to say, "OK, I overpaid, but I didn't overbid," go ahead. We all understand.