I have a 48" john deere walk behind right now, and i need something faster, and i need another mower so that i can get things done quicker. There is a scag 52" turf tiger for sale that is 3 yrs. old, approx. 900 hours, and said to be in good shape. The person is asking $3000. Is this a good deal? Is 900 hours too many, or does the mower still have a lot of life in it?