:"If the two subspecifics are so radically different that actual science should award them subspecific status, then why would you have trouble telling what you're puportedly going to buy?"
:It's because they've been crossed together. You could take a bullsnake and a corn hybrid, then breed the offspring back to a corn or a bull, and then breed those offspring together, and then mix it up a whole lot more. Just like what has been done with diamond and jungles. Pretty soon there would be some hybrids that would look like pure corns or pure bulls.