Yesterday i looked at an everride warrior "2004" model with 187 hours that's for sale for 5 grand or best offer. I asked the owner where is the hydraulic tank located? The owner said he didn't know there was a hydraulic oil tank!!! The machine looks nice but when i found the tank I noticed a lot of build up where dust had attached to the leaky hydraulic oil tank. Upon opening it there was only about an inch of oil in it. So later that day i called a dealer and asked about what the correct value of a 2004 warrior. He said from $4500 to $5000; and additionally, in 2004 there was a hydraulic pump problem and all the everride mowers they sold had to have the pumps replaced at a cost of about $800. if the motors hadn't been damaged as well. He said they use a differant pump now in manufacture to correct that problem. I've read else where that someone worked for a distributor and during that time there were numerous hydraulic updates. I was wondering if any one could advise me on the appropriate value and /or what sort of buffer I should apply to cover for hydraulic expense? Thank you in advance for any help.