Loaded question ?? A lot of the folks around here sell theirs in NC. They got contacts up there that don't ask questions !! The green men in these parts are/use to be strict on the sales when records and permits and such are involved. At one time, you had to report how much you harvested and sold !! Maybe Hillbilly will chime in here. A lot of dealers/buyers in NC. If ya got all your permits and such, google may hold some info..
We have a couple local buyers here, I would assume it's the same there, just look around. As Greg said, you usually have to fill out some paperwork as to where you dug it, etc.