So I've read all the docs on the site and I'm still confused. I live in a marketplace state, Ct.. I sell a couple USED guitars a year. Do my buyers have to pay sales tax on my used guitars, even though I'm small time? That seems ridiculous. What about buying a used guitar from a non-dealer in another marketplace state? Really sucks if that's the case. It's not a used car. I'll be sticking with Craigslist for future buying and selling if that's where we're at.