I have the original PSP model for sale with the Logitech Playgear Pocket case. The console is in perfect condition (thanks to the amazing case!).
I should point out it is a Japanese model. I have been told that the screen on these models is of a higher quality than UK models, and the only difference I've noticed is on the XMB, the roles of the X and O buttons are reversed (they are as normal in games). Apparently that is fixed if you install custom firmware.
P.S. I have the original box and accessories if you require them.