It depends, what Firmware does he have? If its 2.80 or below get it and PM me for details, if its above 2.80 and is not a custom firmware don't get it. Also either way buy a 2 or 4 gig memory stick after, 1 gig is nothing. Either way PM me.
Also @ Fanghorn: The battery life is about 6 hours and you can buy new batteries that are a couple hours more than the DS's.