Yes, the OP's first communication to JP was simply an inquiry, but JP's reply -- that he would sell the card for a certain price and to let him know -- sure sounds like an offer to me. (If it wasn't an offer, what was it?) JP had the right to rescind it, but he did not, so when the OP accepted it within a reasonable time, they had a deal.
If the buyer had hit JP's BIN on ebay, and JP had then said sorry no sale I repriced it, I don't think anyone would be defending JP (perhaps I am wrong). So what's the difference in the two situations?
|