I bought the unit I have as a package of two units. Reason was I was missing some buttons and that was the only way I found to get any. I paid $40.00 for the two units and neither has good electronics but all the mechanical parts are ok. Since I got all I needed from one unit the other is ready for a new home. If you want it, I can let you have it for $20 (and shipping). It is light so should not cost too much for UPS land. My model is a 90 300E, 124 chassis.