I think a new 16 gig one should cost 500 and giving it to your friend for about 450 should be ok for both
anjinhamarota: are they locked to your provider in Portugal as they are locked in the US?you presently cannot unlock 3gs,and as the italian price for a perfectly unlocked 3g usable with any provider's sim in any country is 569- 16gig, i say 450$ is ok for one that's locked to AT&T,for a friend,that is..
iPod touches cost 229$ in the US and 219,if i'm not mistaking,in italy or all europe..about 330$