Hi friends,
I have case situation like this: the current bidding is €54.5 (I started 1st bidding at €52.5 , then I was outbid at €54.5), so i set my highest bidding was €90 and won the auction at €80. The point is only 3 bid which are: 52.5 ; 54.5 and 80 . Suppose to won the auction at 56.5 or something right? Because i am the last bidder and won the auction , but why €80.
Appreciate for your time to read and explain my case. Thank a lot!

Unfortunately, I can't check much without any reference information like the item number.
Is it possible the seller set a reserve price at 80? In this case eBay will behave the way you described.
Please check.