You obviously never watched a Broncos game while Bell was on the team. Bell sucked in Denver because he goes down after every single first touch. He also sucked because he likes to fumble...........a lot.............in pressure situations especially. He also sucked because he gets hurt every single season for at least five or six games and can't run effectively because of that.
And Denver has sucked the last two years, not few years. A few years ago they were in AFC championship and lost to eventual super bowl winner Steelers.
You can have him in Dallas, just be ready for an injury plagued, fumble riddled season.