I have the chance to buy a used Cub Cadet 21" Self-Propelled mower for $100. It has a 6.5hp Kawasaki engine. Model is SRC 621. It has swivel wheels up front and a 6-speed transmission. I was wondering if anyone has used this mower and if it sounds good. Was also wondering if anyone uses the swivel wheel mowers and if they prefer them or not. Right now im using a Craftsman 21 so i know the CC isnt commercial but the Kawasaki engine seems like it would be better than my B&S. Any input is appreciated.