I picked up a client that has 2 toro z500 series mowers around 3 years old. One is a 52" Kohler engine that has 0 hrs NEVER CUT GRASS. Second is a 60" with 50hrs. The guys bought them both at same time and had heart issue and never used the 52 just the 60 a few times. What would be a good price to buy these mowers at? He is looking for 10,000 for the pair. Thanks.