Seeing that im guessing you're not a felon, you're an American and therefore a legal and lawful gun owner and all your doing is offering a trade for a pinball or maybe someone buys them outright, it shouldn't matter, those are guns not illegal drugs, and albeit some people of a particular political ilk may not understand or like guns, you have the right to do it. If pinside had a problem with what is a legal and lawful act, then I'd say they were a site more concerned with politics and not the law and what's right. As a private gun owner is your right to sell or trade your guns. Stand up for them.