I'm sorry Ingrid. Perhaps you could emphasize your potential loss in return postage when the item was not as described, which is why you gave the item a trial, as discussed with the seller. As well mention that the two month period is due to the fact that he has not responded to your repeated attempts at communication, despite having made sales in the meantime as you mentioned, just so that Paypal gets the entire picture. Make it obvious that he is trying to manipulate the facts/circumstances.
Oh, sorry, I just realised you got your money back...great! He's just venting...I think I mentioned earlier that Paypal normally sides with the buyer, particularly if item was not as described