Collier is a decent big man, he'll always find a job in the NBA. Big men who can set screens, has a decent shot and is a solid rebounder and can take up space will always be employed in the NBA. I agree with GATOR, I can see several teams in the East picking him up, Orlando, Miami, Toronto especially, Detroit, Collier will find work if he doesn't return to the Rocks.
Perhaps he is getting playing time for trade marketability. Most likely, Rox won't resign him so maybe they will shop him before the Feb trade deadline. Plenty of teams out there would be interested in a serviceable 7 footer.