Got mine for cheap but it was cheap for a reason. I had to completely disassemble it and clean it up for it to disengage. I paid $180 but I've seen them from $250-400 with nonfunctional electronic motors.
I got mine from a guy for $150, but I talked him down quite a bit since he didn't have the bushings/retainers or any of the electrical with it. I think he was wanting $300-$400 originally. I put new bushings and an EVO no-limits on it anyway