And that is why I have also instant prices (that are negotiable as mentoined at the rules section) - if you really want pokemon, you can buy it for instant prices - it's too high? - then bargain. Last moment bid isn't something unusual, you were just another victim of that kind of market trick.
Sorry for unconvinice, but that were the rules - last (highest) bid wins when the time is up. If you bid - you agree with those rules. Even if this seems unfair for you.