Might I reccomend AquaBid. You can get some nice fish for great prices.
Victoria Parnell Stark (thanks Facebook for spelling :P) who owns www.bettysplendens.com
has VERY nice fish in pairs for about $20 (for the pair).
As for breeding: Breed brother to sister OR daughter to father. You'll get nicer fish that way. Remember avoid breeding runts or fish with bad fins. Also try breeding to a DT to an ST then inbreeding their fry (get's a nice wide dorsal in your STs which breeders go crazy for).