Man, that sucks big time. I'm glad my PS3 sale is now past any point of chargebacks and the like.
I did have a buyer file a dispute on a game I sent to Spain. Said he never got it. Since it wasn't too expensive I didn't insist on shipping with insurance or tracking (just airmail letter post). But all the people who are saying "send pictures", "send emails", or whatever to PayPal I have found out that they don't give a rats ass about any of that. Since I had no tracking that was end of story as far as they were concerned.
But here's the kicker - in his PAYMENT to me (and thus documented on PayPal's site) he said the following: "Hi, please be careful with the parcel cause sometime I had problems with any package and it took long time to arrive or it didn't arrive. I hope it hasn't any problem. So, please warn me when you has sent it. Thanks in advance.". I offered in the dispute to spilt the cost with him. He didn't respond to that at all and PayPal did not take up the offer either - I would think with that admission on his part I'd have some grounds. But, like I said, they don't give a rat's ass.
To top it all off, when they refund the guys money, they didn't even give back the PayPal fees for the original payment. OP, did they do this to you as well? They would be pretty substantial on that PS3 purchase.
So, I was out the original game (not to mention it's higher current value), international shipping, my ebay fees, and my PayPal fees. I contacted ebay about it to see if, as a seller in good standing I could at least get my auction fees reimbursed (even though it was after the 2 month claim period). They said they couldn't do anything about the final value fee, but did refund my listing fees - big whoop, those were all of 20 cents

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I thought I was clear of the feedback period, but apparently it is 3 months (so OP, nail the guy with a negative if you haven't already). But get this, the buyer, who ignored my offers of splitting the cost, left me POSITIVE feedback and has been pestering me daily since then to reciprocate!!! WTF? This guy is going to annoy me into negging him! I have no idea what he is thinking.