If you are truly looking for a pet, something you aren't planning on breeding, then its just going to be about finding a breeder that is trustworthy. there are plenty of beautiful healthy dragons in the classifieds. i would start by finding one in the price range you are looking for, then start building a dialogue via private messages or email, i would suggest calling them too. check the boi's to see if there are any hookey business practices going on with the breeder you have in mind.
If you shoot me a pm i'd be glad to let you know who i've bought from and got great dragons from. i can tell you that silk backs require alot of extra care, leatherbacks are the same care wise as the "normal" beardies.
especially now during the height of the breeding season you shouldn't have any trouble finding a healthy , colorful, even leatherback if ya want for around or under 100 bucks.
just do you best to find out who you are buying from first.