Where to get tattoo supplies actually is a very... I don't know. It's a hard thing to talk about. In most companies, they don't sell to someone that's not actually a reputable tattooer, with a business license or a tattooing license. I suggest only good quality companies.
I'm sponsored by Kingpin. I'm also sponsored by Eternal Ink. Those are all really awesome companies that have a really high-quality product. Bicknee Supply Company out of Ohio is a Mom and Pop. Really good friends of mine. They sell a lot of really good products.
But also, they're not actually selling to individuals that don't have businesses. If you want to learn to tattoo, it's really important to do it the right way. Go through an apprenticeship, pay your dues, and you'll learn how to get tattoo supplies from your mentor. And I just don't suggest going out and trying to buy stuff off of eBay, because you're not buying high-quality equipment, and equipment is really what makes and breaks a good tattoo.
What we are trying to do here is to educate, to be able to help people get the best possible quality equipment, and do the best quality work. I don't condone tattooing out of your house. I just condone you going out and paying your dues, get an apprenticeship, and do it right.