I bought Kimba from my local Petsmart (Which is also where I go for supplies. I prefer it to our Petco, though I go there when they send me coupons. LOL). Or should I say he claimed me, and I just paid bail. LOL!!! (Little guy was glass dancing like crazy every time I walked by. Totally melted my heart.) I was looking in there today and couldn't believe that he was once that small. He's growing like a weed, probably close to 14" long, and I got him on Memorial Day. Need to measure him again when he's sleeping, LOL. I also suspect I lucked out because I read and researched a lot Kimba, so he was able to thrive. (Which really, isn't that the point no matter where the beardie came from?)
But really, having done a lot of work in the parrot world as well (Ran a finch rescue and raised small parrots), it's usually best to buy from breeders. I love browsing the ads on this site. Part of it is finding a place, pet store or breeder, that's nearby and works for you. Stores can be as different as can breeders.
Bet you can't wait to see your new beardie! Show pictures.