Wow, wouldn't it be great if he'd sign a cheap contract for umpty ump years so we could trade him for a more talented player? YOWZA!

All this speculation on a trade to the Bulls is predicated on Nazr doing something dumb and against his interests.

Why would NAZR do a 'sign and trade' for less money than he'd get as a FA?
Why would they? For the simple fact that the Spurs (or any other club for that matter) wouldn't be stupid enough to allow their own player to leave in FA without getting something in return.