Then you should avoid my own auctions : If I am offered
a trade for a cel I want, I won't have any hesitation
canceling an auction...
The deal is not done until the auction is ended. As I
already wrote on the Forum, if a seller and buyer get
an agreement, you can't do anything about it and it's
useless to complain if the auction is canceled : even if
the auction isn't canceled, you don't have any chance
to outbid the buyer as he already has an agreement and
can then bid whatever he want. It would just be for
the "show" and nothing else.

Cheers,
Yann Stettler