Are there any suppliers in the U. S. that sell high quality
findings such as this leverback pictured?
and that's just a start. There are many more, though some are more
stringent in who they'll sell to.
But seriously here. If you're considering yourself a professional,
and if you intend to do that level work, then treat yourself as such.
You don't need to go the whole route of incorporating or anything
like that. Just get the sales tax or similar business registrations
that will actually allow you to buy from actual wholesales, rather
than hobby oriented places that call themselves wholesale, but sell
to everyone. Rio and Otto Frei will sell to you without, but Otto
Frei, at least, will give you better pricing if you can show (via
that tax id) that you're allowed to buy wholesale (the issue is just
sales tax registration, not the amount you buy). Not sure about Rio.
Stuller also wants the tax id. They won't let you buy all the
finished jewelry with just that, but you can by tools, materials,
findings, metals, etc, if you get an account with them (costs
nothing to do). To get that, you mainly need that tax id.
Getting that tax id is not hard, nor does it cost much of anything.
A little extra paper work at the end of the year for most small
craftspeople. And if you're doing more and need to file more often,
then, well, you're really a business, and have no excuse not to have
those licenses. Here in Seattle, I needed to get a state UBI
sales/use tax license, and a Seattle city business license. It took
about half an hour online to get both. simple. Not costly.