I have seen kids who treasure their lizards but we all know of kids (and adults) who buy animals and treat them as a disposable toy. I am not sure that cost is a promise of good care- more successful IMHO is to try to get to know your customer a little and if they seem irresponsible just don't sell them the animal.
Half of all marriages end in divorce, if people can't stabilize their human relationships there is no reason to expect they would do any better with a lizard.
Just try to do your best to see that the little hatchlings are sold to good homes.
BTW no one ever only has room for 'one more pair' LOL
