They are selling the Pacific Candy Basslet, also known as a Swalesi Basslet (Liopropoma swalesi). They have the same patterns as the Candy Basslet (Liopropoma carmabi), but not as bright/colorful.
I would never pay that much for a fish either, but I may be able to get it for a lot cheaper by getting it straight from a diver. It's just a matter of him being able to find one.
Have you found a fish you want yet? A Helfrichi Firefish would be awesome.