Yes.
no
Unfortanatly you can NOT do that because the PSP is more then the Nintendo Ds and they are in diffrent companys. Sorry
Yes you can, many places will give you a PSP in exchange for a DS, and a sum of money to cover the difference.
your choose
PSP because a DS you only go left and right and PSP you can go anywhere
You can Maybe trade 2 used psp's for a used go at gamestop
no you can not
Just trust me PSP by far you can go on the net
you could just go to google and download the ds emulater for psp
If you trade in 3 games with a PSP 2000 or 3000 you get $100 credit for a PSP Go.
No. because the PSP costs more. But you can probably trade A Sony PSP for a Nitendo DSi. =] yes actually you can you just need extra money
Yes and no. Yes being you can turn your Ds in at a gamestop and get a PSP, and no being that you will still need to pay some money due to the fact that they will not give you a PSP for just turning in a un-equivalent system.