I have found an Exmark Lazer Z model LHP4420KC for sale with less than 100 hours on it. It is a 44" with a 20hp Kohler, but I don't know the year model. The owner died and his widow is selling the mower and she doesn't know when he bought it. The serial number is 472xxx; can anyone tell me what the year model is from that serial number? What would be a "good deal"? I have been looking for a little larger ZTR, something in the 52" to 60" range, but if this is a good deal I may just buy it this weekend. I will just be mowing my 1 1/4 acre vacant lot and my home with about 1/3 of an acre. I may also mow some for my dad, his total acreage being about 3 acres. What would this mower have sold for when it was new? Are there any problems with the Exmark that I should be aware of? Thanks for your help!