Hi bro...
I've personally put up a colony of zoos for bid lately... to be honest, the final bidded price exceed my expectations and even the wat I would expect the coral be worth. I end up having to reduce the price of the coral and also end the bidding early to prevent the price from escalating to levels which I cannot phantom. Although I must admit that in the end I made a profit!
In a bidding system, you pay for wat you like... how long have we tolerated someone who has come in to offer ridiculous prices for some of the corals sold? The same buyers have attempted to cut the sellers throat to get a good deal.... Hence the bidding system may have its usefulness.
Like someone mentioned, willing buyer, willing seller, if everyone feels that ur price is too high, nobody will bid... and I still feel that you pay for wat you like...
Juz my $0.02...