Is it legal in the US to buy or sell bitcoin directly from a miner?

Assume that nothing shady was happening and the transaction was logged on whatever software the business uses and it was a legitimate business with all proper registrations. Also assume that the sending/recieving party did not share any identifying information. I ask because the privacy aspect might fetch a heavy premium and might make mining business more viable for hobbyists. Surely it isn't illegal right? I mean even in some states you can sell a gun with no background check if it's private party.