All the 3 Petcos near me in the Boston area are clueless about leopard geckos and bearded dragons. This is how they take care both species. All the no-no's you can find out within a few minutes of reading any care sheets.
Bearded dragons - sand as the substrate, mealworms in dish, no veggies
Leopard geckos - sand as the substrate, freeze-dried flies for food (wtf??), no moist hide, actually... no real hide at all except a plastic shelf thing a bunch of them piled up inside to get away from the light. Many of the leopard geckos have shedding problems. One I saw a few weeks ago was blind in both eyes.
Petsmart, on the other hand, seems to know how to take care of these reptiles. They use reptile carpets for both leopard geckos and bearded dragons, got veggies for the beardies, no mealworms for the beardies, mealworms for the leopard geckos, plenty of hides for leopard geckos including moist hides. If you are going to go to a chained pet store, go to Petsmart instead.