I totally understand that..I was at the petshop when i first got Junior (i wanted to see how big she would get..) and there was this young girl begging her dad to buy her a Burmese. He did it, and the shop owner said nothing.
However, when Max bought Monty, the shop we went to had a full grown burm. Whenever someone wanted babies, the shop owner would point to the full grown and say "Can you handle that?"
I guess it just depends on what the shop-keeper is running his business for. If they are just trying to make money, they will sell anything. If they love their job, they will make sure all their animals are taken care of.
The Arizona Reptile Center (where Max bought Monty) looks very dumpy from the outside (it is in a slightly bad part of town) but inside is very, VERY clean. All the cages are clean, the animals are n appropriate cages, and the husbandry is wonderful. However, The Gilbert reptile store that I went to was dirty on the outside, and dirty on the inside. They were also selling poisonous snakes (i think it was an asian vine snake or something)
People make me sad...