some cards sell US$100 to a thousand depending on the card. so if you can list them or give us an idea on what your cards, we might tell their prices.
I got a magazine that tells the prices of each card though it's limited to the fossils and earlier than that.
I would offer you anything right now for those cards if it interest me but since i no longer collect, I'll keep my offers to you.
since your "friend" is offering you his psp and some things, I would ask you if you're interested on pokemon cards. if no, get his PSP. that's a simple question.
MtG has no use to me but to my brothers so I can just throw away any MtG he gives me. This is just an example on your situation.
Pokemon Cards are expensive if the card is right so think carefully
PS: Havent seen the links. I'll see them myself and edit my post
UPDATE:
I dont know what that person has drunk but to me he's sure a collector. movie promo are expensive (correct me) so I would definitely sell it at a higher price. same goes to everything rare from you.