Ah i see, they dont just want anybody tattooing... i thought it might be like anything else you have to be over 18i thought you weren't tattooing?
depends on your local market. a tattoo shop here will most definitely NOT sell supplies. there is ONE place that resells chinese junk - but is handy in an emergency.
when i was in las vegas.... there were a few very high quality supply shops.... but you couldn't even get in the door w/out showing your tattoo industry card - as an apprentice i could only get in & purchase w/a mentor.