Fellow lawn care enthusiasts, I have found a local Walker 2002 grass handling system, Model MS-GHS with an air cooled 11.1 HP Kawasaki FE 350D, 1 Cyl OHV. There are around 530hrs, 42" deck, and an extra thatcher included. The seller would like $3800 but would take $3500. The price sounds fine but I don't know much about the motor and how well an 11hp engine will hold up. There are lots of slopes in Mid-Missouri so keep that in mind too. My question is: -What is worth? -Could you tell me a little bit about the engine is it reliable or problematic? -How long should one expect this motor to last? -What should I look for when I view/demo the mower? Any other insight would be greatly appreciated. Thanks in advance for the replies.