Well if someone had a tall cool water tank the fish could do fine and thrive. I'm pretty sure that Live Aquaria will make sure that whoever buys the fish knows what they are doing.
I think they may have already done research on the fish and why shouldn't they sell them? I see no harm in it. Sure it may have been the first time collected, but there is always a first time for everything ya know. They only have 3 up for sale. I also don't think it's stupid to pay that much money for a fish. If a person can afford it and really wanted it, then I don't think it's stupid at all.
I have not found a fish yet that I am willing to pay that much for, but I am sure one day I just might find a fish that I love and pay that much for.