The 2GB, 4GB, 8GB, and 16GB M2 have an MSRP of $27.99, $44.99, $74.99, and $142.99, respectively, although some sellers may lower those prices.. But for those of you with PSP 3000 and PSP 2000 ...

While Pro Duo cards are coming down in price, they're still a little on the expensive side. I have a 1GB card in my PSP right now, but of course more room is always preferable. The PSP Double ...