If you really want one they have a slew of LE trade ins at Clyde Armory in Athens for $649. I saw a wall full of Bushmaster and Colts the other day.
I am not an expert so I don’t know which year or variant these are, but most are in good shape.
They are in pretty good shape for a M4orgery. Priced a little high for this market, but depending on the resr sight and front handguards, it might be a good deal.