My 2 cents worth Make a deal YOU can live with. If what this person wants is total rights (and you can do nothing else with them) make sure that you are paid well enough to cover what you could make by selling to the general population in the marketplace and such. Also if this person is going to do something big, you sould at least have you name put in the credits or be paid extra. (if your name is linked with a big project, that is resume material, not having you name linked is giving up a immaterial asset)