I have a 2001 Exmark Lazer Z HP 52" / 23 Kawasaki that has only about 100 hours. I am a part timer, had it less than 1 year and I have maintained it by the book. I have about $7500 in it, the mulching kit, and 3 sets of extra blades. I am sure the 2002 is even more expensive. My properties are all small residentials so I am thinking of replacing with a walk behind. How much should I ask for it? Give me your opions!