I agree. I picked up my 12" RTC for $20. The pet store started out asking $50 for it, and then 3 months later, it was down to $20, so I picked him up. They get way bigger than what you've got, and no one's gonna have the tank big enough to keep it for life (needs to be donated to an aquarium, eventually), so no one's gonna pay $250 for a temporary fish.