I could never bring myself to buy from Mast Bros because I figured it was all marketing.
have purchased from Fine and Raw, which is around the corner from me. Can't tell if it's legit or not, but I have enjoyed whatever I've tried from there.
met with artist for about an hour, had a great chat. Changed plans a bit - instead of finishing off half sleeve on right arm, going to do a full composed piece on left arm (right arm already has work, left arm is blank). Initial thoughts are shoulder down to elbow.