I bought a used Volvo Mini Excavator about 12 years back. Based a lot upon the independent inspection. I questioned it for a five year old machine to only have five hours on it. Was told it was wrong machine for rental market it was in. Trucking company was to pick it up the next day and I called to verify all was ready and to give them notice. Happened to talk with the shop manager and mentioned the amazing low hours...he was quick to say the hour meter has been changed, it has more like 500 hours...salesman with Volvo was in the area and did his own inspection and came back with there is a track that is also not as represented. We came to an agreed to lower price. The salesman and I both came to the exact same price independent of each other. I have bought three used machines and found the dealer in each case was dead on with the machine. One Volvo, JD and Kubota. I had another dealer I had talked with about three times before pulling out for about a five hour drive call me back to tell me after thinking on what you are wanting in a tractor do not recommend this tractor, believe it will not meet your wants. Not sure he had a company label but an honest dealer in Virginia.
As to house inspection sold one twenty years ago, their inspector had two issues with our house, both bogus. Had general contractor confirm one and the other as electrician told them he is wrong on that electrical issue, pulled electrical book to prove it.
I worked about eight years as an inspector for a heavy equipment manufacturer from the individual parts to the machine completed and even loaded tested them. So I know the value of a qualified inspection but also have the same thoughts as does "chim". Would you have a standard check list that is provided to the potential buyer? Would there be fluid test?