*UPDATE*
This actually took place last night, but I had to go to bed. Since so many have responded, I figured It needed an update. After posting this, I got an email from the sellers husband. He told me that his wife felt that she had no choice, but to clull him, and that was very upset doing so. He told that in addition to the move, they had a 4 month old, who was going in for surgery today. So his wife could not take the chance in getting everyone elses fish sick, and just could not nurse this fish. He then said, I did not have to go through with buying the other fish, and they would not hold it against me.
Although, I still feel that I should have been consulted, I can understand the stress she must feel. Looking in on the situation, I can say, that shipping him to me sick, at least would have given him a chance. I don't know what decision I would have made IN THE SAME SITUATION.
I personally have not had to put a fish down, and don't know if I could. Some of you may think it is cruel, but I would fight until the fish's last breath. I tend to hold on to the hope, that as long as it is still breathing, there is a chance.
I did pay for the other fish, and got word that they went out today. I should have them tomorrow. I have been having lots of trouble with my computer, and don't know if I will be able to post pics. If I have to, I'll try to at least link to the auction pages, of the ones I won.