I think that SONY are the best. I bought 5xSONY MS 1GB Pro Duo High Speed for just $55 each (shipping included) on ebay. Two of them are mine and the other three for my brother who also got a PSP. I also came infront of another offer! I found a SONY MS 2GB Pro Duo High Speed for $130 that I also bought! If I sell my 2 other sticks here, I can even make $200 cause non High Speed 1GB costs $110 from a store.

General conclusion: Search ebay! You WILL NOT find better offers!

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