Should I Do This Trade?

I don't realy play these games, and i've already beaten them and my friend was to buy them for $120. Should i do it? Or am i ripping myself off?

Dragon age origins

Killzone 2

Fallout 3 GOTY

Metal Gear Solid 4

That's a much better deal than you would get for trading those games in. Personally, I would never trade in my copies of Dragon Age: Orgins or Metal Gear Solid IV but if you don't play them anymore, then why not?

really depends on what you think, since you've played them all and beaten them and stuff, its well worth it. if you took those to like gamestop or something, you'd get like $20 lol