this just in: know nothing person stumbles on a unique part, does some cursory research and asks for a second opinion so as to wring as much possible cash out of something and then gets aggrieved when told otherwise.
I think you nailed it. Nobody insulted the guy. He's just unhappy because he's not getting the answers he's lookin for. He doesn't realize we're actually helping him. But WTF do we know? In this day and age, he might get $500 for it. lol