This PSP is, by far, the BEST handheld console ever! I have owned a GP2X, Gameboy (original, color, SP, DS), and this beats all of them! In fact, with emulators, you can even play Gameboy, Gameboy Color, and Gameboy Advance games on it! There are also emulators for NES, SNES, Playstation 1, and a bunch other consoles. You can find a list of emulators by searching Google and psp.qj.net.
It is running custom firmware, but it hasn't been used in a while so it's kinda old. This doesn't really matter because you can just run the update feature to update it (I'm too lazy to get ti set up on my wireless network). Also Google "PSP custom firmware" if you want to know more.
I also use this to listen to internet radio occasionally. It's pretty awesome. There's a neat web browser function too, but it's unwieldy.
Oh yeah, and in case you didn't already know, it has built in wifi so you can play with your friends without a link cable. If you need more information about this console, you can search Google for it's model number, "PSP1000".
It comes with a battery, 512 MB memory stick, and charger.
I'm offering free shipping to the continental US only!
International shipping will cost an additional $15.