While i agree a pet is a pet, and i would do whatever possible and within reason to help a sick fish in my care, i just dont think i could personally justify spending that kind of money on a goldfish...
Maybe its just that i dont care enough about goldfish to be willing to go through that trouble, not to mention i doubt there are many vets in this town (if any at all) that could do surgery on a fish... Especially when you consider there is only 1 reptile vet i've heard of in all HK