Individuals who occasionally sell items privately are exempt from collecting state sales tax in PA, nor is the purcasher required to submit it. It's what is referred to as an "isolated sale". No sales tax on your purchase required, and if the FFL tried to collect I would refuse to pay it. Section 32.4 of State Tax Code.
Autos are exempt from this rule, and private sales require sales tax to be paid to the State when registered by new owner.
Last edited by simoncool; 08-27-2018 at 07:29 PM.