Replying to Ebay: didnt recive product

I bought a camera on ebay from a user that looked legit and had 100% feedback, good responses and used paypal. but now he hasnt contacted me since he said that he shipped the camera. its been 12 days since he said he shipped it and it was supposed to take 2-3 days. I've emaied him constantly and tried calling him but his number is disconnected. I opened a paypal dispute, and will escalate it to a claim if he doesnt respond in the next couple of days. any advice or tips? thanks, and this is really lame...