When buying a dragon there are many things to look for. When you buy a Bearded Dragon when they are juveniles it is vary important to look for a healthy bearded Dragon. Here is a list I made to purchase a good dragon:
There are many other things too look for, you should ask the breeder or a qualified pet store employee eating habits and what they feed it and how they take care of the prey. You should look around from store to store because there might be a different dragon that is healthier, a different color and a better price. The end result of your pick is up to you. Remember they will be with you for a long time, from 4 to 10 years! I would not pick up a dragon that is all by its self because it is hard to see health differences without anything to compare it with. And you might not be getting the best lizard if there is only one to chose from.
Before you get the dragon you should have the tanks all set up with all the lights and heat laps working for about 2-3 hours and make sure it gets to the correct temperature. If you need to make adjustments to the wattage of the heat lamp, to have the bearded dragon at the correct temperature then you must do that before you get the lizard. Have a secure top so other pets or children can't get into it and to make sure that Bearded Dragons cant get out. It is amazing how high they can jump if they set their mind to the task.
If you decide to buy a lizard then you should get a few basic items for their habitat.