You could try DX they sell them really cheap and with a mem card if you want I ordered 2 with a 4GB and 2 with 2GB mem cards. The 4GB combo is 33.80 and the 2GB combo is 22.70 or the battery alone is 10.50. They also have a sweet deal on 8GB duo pro's for 49.80.

 

If you already have a memory stick, you don't need to get the bundle.

 

I suggest you invest some money on a genuine stick. Fakes are notorious for not having all advertised space allocatable, slow read speeds (which will be a problem for some/most homebrew and games), not to mention failing out of nowhere. You can find a 4gb sandisk card which has superior read/write speeds of the conventional sony stick at newegg for $43


http://www.newegg.com/Product/Product.aspx...N82E16820171130