He is signed for almost nothing through next year before becoming a RFA; I have no idea why the Lakers would ever consider trading him - especially for Nader and a crappy 1st.
I guess it also really comes down to who the Cs prefer: Nance Jr or Theis. Theis is already familiar with the system and can help stretch the floor. I would happily add Nance Jr. to our roster with or without Theis, though.