I'm looking at a 10 year old 48" Ferris Dual Drive. Can anyone give me any pointers on things I should look for? I am assuming I can just tug on the blades to check for bearing wear. Also, I plan on jacking the machine up to try to check for play in the spindles. How can I evaluate the hydraulics? How long do these usually last? Also, what would a good price be assuming the mower has moderate wear (worn cosmetics, good mechanicals)? Thanks for any help you can give me.