If you have gotten everything out of them that you wanted, then yeah why not. Unless you really love these games.
Very rarely do I sell my games, or trade them in. However, when I do, I never get rid of a game that I truly love. Even if I may never put any time into it again. I haven't touched Vanquish, Bioshock and Uncharted in over a year, but I would never sell them. Love them too much
So weigh out everything and see whats up ok --- PS3 without Immersion lacks Rumble and PS3 without Rumble lacks Immersion. Finally Sony did the right thing