I am looking at buying a used Ferris w/b. Its a 52" DD. It is about 6 years old with about 600 hours on it. The engine is a brand new 18hp briggs vanguard with 10 hours on it. The caster spindle bushings are worn a little and there is just a tiny bit on play in the deck spindle bearings but not much. What is something like this worth? He was asking $2,500 but said he would take $2,000. I think he might go lower though. Also is there a way to adjust the tension so it takes less force to squeeze the control levers?