What PSP to get and at what price?

I am looking to buy a PSP and I have a few questions.

• Does gamestop have fair prices on their used PSP systems?
• I am perfectly fine with getting a used one, but should I trust the previous owner? I guess what I am asking is how durable are they?
• Which one is the "best" for the money? Your opinion and why please.
• I'm interested in the Peace Walker combo thing since I planned on getting that game anyway, is it worth it?

Any other helpful info is much appreciated. Thanks.

There's a thread dedicated for this.

I wouldn't suggest getting a used psp, i've returned a few that have been in not so good condition, the first one i got just locked up and wouldn't even turn off, so I returned it the next day, then I had a few that would have the pixels on the screen just go out for some reason, causing the picture to have some blanks spots, which is unacceptable, so I returned those. The one I have now is pretty good, though idk which psp model it is. But I'd suggest getting it new.

psp