Very occasionally Inland Reef in Cross Lanes has fish. My eels, trigger and koran angel came from there.For most of my time in the hobby I never quarantined fish, but I have just recently seen the error of my ways and started doing it. It also prevents me from buying fish too quickly because I qt them for 6 weeks before putting them in my display.
Is there a LFS near you that I don't know about? Due to a lack of LFS many of my fish also came from PetCo, which I've had pretty good success (or possibly luck) with.