Don't forget though we are talking about an auction site.
There's books and books wrote about the adrenalin pumping as a sale is ending, which translates into extreme behaviour, just to win.
Same on that homes under the hammer, some folks double their initial maximum, and mostly kick themselves after I suspect.
These sky high prices would never be reached in a set sale, because no seller could imagine any buyer would pay that much.
Its a trait that's here to stay, thats for sure.
Ed