I know what you mean but there is one example
The price is currently lets say 1000.
At 2 seconds before it ends I do not click 1001. I just set 1500
If you set 1800 2 seconds before end you get that.
It is just about setting a maximum price at the end of an auction.
Or do you mean once you are the last one who set a bid before it ends, you cannot re enter another one?