So far, my experience with Ebay has been pleasant - Pos Malaysia never fails to deliver, hehe.

I suggest you wait for a while since he sent it on the Nov 23rd, sometimes first class mail takes about 3 - 4 weeks. I had an item sent on Nov 18th and just received it today. If it still hasn't arrived in 4 - 5 weeks, then you can contact the seller and if he's willing to send it again, you have the option of paying for USPS International Priority Mail, which can be tracked.