With him being a RB I would not pay him the type of money that he wants.
Le'veon is a heck of a player, but probably the 3rd most valuable player in that offense (yes I would take Antonio Brown and Ben Roethlisberger over him-those are two Hall of Famers and Bell is not there yet).
20 million a year guaranteed for 4 is WAAAY more than I would pay him. That being said, he might get it on the open market. Which is why the stand off is happening.