Ebay Problems - How to get money back

[rwl04]

Well I bought Superbad and Live Free or Die Hard from this seller on Ebay about 3 and a half weeks ago and have yet to receive them. I had 3 seperate orders with the same seller prior to this and I had no problems. I've sent numerous email with either a one sentence "your oder has been shipped" reponse or nothing at all. He says he sent them but when I look on Paypal all it says is that on February 18th the post office was contacted but does not mean that we have received. I guess its the same standard message when people print their own shipping labels is what I'm guessing. Anyways, I opened a dispute on Paypal on Sunday and again I get no response from this guy, all I want to know is what is the best way to get my money back from this seller.