The state the game currently is in, is not called for any trivial reason ''stress test''. In stress tests, bugs, server stability, play-ability and other technical issues are trying to be discovered. Trying to justify the behaviour of those so called ''auctioneers'' at this state of the development of the game is pretty irrational. It is a stress test and still in development. There might be new players here, who never played the game, however if ''auctioneers'' block the spots for these people, they will not be able to play anyways and make mistakes, buying overpriced cards at all, defeating the purpose of the actions. And I am sorry, but how do you know the price of let's say a common card in Skylords reborn, just because in Battleforge the cards were a certain price. The shell of the game might be the same, but not the internal values. Correct me if I am wrong but there is no intention at all to make the game as close as possible to BF again, especially when it comes to economy. But this is redundant anyways right now, if it is not obvious enough.
Well you get the information, which person bought the card, and you know what you could do... Inform the devs about the behaviour of such people and maybe there will be a friendly reminder for these people.