Willing to sell it to you for 0.75BTC the amount I bought it for.
So, I just want to make sure I understand. According to your logic here, if someone broke in to my house, and made off with my 60" Plasma TV, then sold it to someone, I would be expected to pay the person back who bought it from the thief? ...
No. It is more like he went to the OP's house, paid for it and didn't get a receipt. Then the seller is claiming that he did not actually sell the TV