Went to Sg Wang just now, asked for the price of basic PSP package. The seller said they have 3 version; cheapest is for non moddable. They said have to change the chip to flash it. 3.70 version more expensive. The most expensive is 3.90 cfw moddable.
Don't know if it's true or they're just trying to con. Anyhow, I'm just asking them, no intention to buy one yet I already owned a PSP-1000. Just ask this and that to kill time