I bid and won a 30# tank of R-12. It was sold as a Dupont Product which is the most desirable, so i bid high and got it for $530. The picture showed a Dupont tank with a sealed valve. The guy sent me another brand - Sercon. Pure false advertising. I could have gotten a Sercon tank for about $150 less. He wants me to keep the tank for a $75 dollar refund (I asked for $150). He says he will refund me in full, but i'm definately not trusting this guy now. If i send it back, will i see the money he has promised? It was a paypal transaction. TIA