I think the two skillbooks replaced by eating body parts are 50g each. The other ability you get is Levitate, which, while it seems cool, I haven't been able to justify using a memory slot for it. Honestly, I haven't found much need for Fortify or Magic Shell, so those usually get cut, as well (mostly because they're just really weak, especially if you don't have the skills that buff them). Truly, I feel like Cannibalism is one of the weakest racial traits. Of course, that's counterbalanced by Flesh Sacrifice, which is easily the strongest racial trait.
