aside from price you should be more concerned with the husbandry the fish recieve while in the LFS . price varies health of the fish and YOUR sucsess in keeping them is what matters
Flame angel is a common fish but ranges $40-$70 i personally shop every where... Every fish is diffrent i have over paid at the worse store and gotten a gem and cheap at best store and it did not last a week... active and eating is what i look for... last fish i added i watched for over a hr before he came home....
I called him today and he had a few flame angels from last week. My only concern is I went last week and the other fish in the same tanks as the flames had white spots that resembled ich.