I was just up to the Meijer store by my house, and found that the Sandisk 4GB Ultra II MS PRO-HG Duo was on clearance for $9.99. That is a good price for that card. The reason I got this MemoryStick is because I purchased (2) regular Sandisk 8GB MS for my PSP and the data transfer rate was so slow (around 6 - 7MB/s) that the games would lag and lockup. The card pictured above guarantees a 30MB/s transfer rate.