I don't think they were snipped either.. the whole back where the dorsal fin is connected would probably have the scales grow back abnormally if it was.
That hump is rather unattractive though. If it isn't a genetic thing that causes health problems though, I don't see the problem.. If they had smooth natural looking backs I'd find them pretty cool looking- I love the goldfish with no dorsal fins. If they're selling these low quality ones, they're probably breeding the higher quality ones as we speak..
To me, a responsible breeder would kindly put such deformed fish down or keep it in a non-breeding environment to live an easy life. Not try and say it's something special, expensive and a trait that should be bred for.
a friend of mine bought a beautiful cambodian girl from PetCo who's missing her dorsal. like the female in that pair, where it's supposed to be, is just a lump. x: those two are beautiful, i adore the male's color, but for $200.... i could get a wonderful breeder pair from a good breeder. or, a few good breeding pairs. :I