For anyone interested in purchasing a bearded dragon, I would highly recommend a guy named Will Oakley. He lives in Woodbridge, which is just a few miles south of DC, on the Virginia side. He was very helpful and very patient with us, letting us hold several beardies...even one of his breeders, so the kids could get a good idea of how ours will grow up. His prices are the best I've seen and WAY better than you'd find at any pet store.
In addition to beardies, he is breeding Western Hognose snakes, and has some beautiful breeders. He doesn't have any offspring available at this time, though.
Oakley's Reptiles
(703) 583-9125