Why don't you just take the PSP 2000? There isn't that much difference between those 2....
I found my PSP pretty cheap thanks to GBAtemp. Found it in the trading section, a PSP 2000 in top condition with all the cables and already hacked + 8GB memorystick for about 80 dollars.
So have a look on these forums or else go to second hand sites, there are bound to be some on them.