Make a list of all your bad feelings and make sure each point is commented on.
This is a list I made for someone considering a diesel pusher so some stuff will not apply.
The price is a little high, but you have low mileage. Alimentally price is a subjective thing. You will pay more for something you really like. You will not be able to resell it for that price.
The one thing I would really watch out for on a low mileage coach is that it sat on a site and someone lived in it. Although it has low mileage, all the equipment may have a lot of use.
These engines and chassis like to be run.
The dead batteries are an indication of the types of problems you may run into with the vehicle not being used.
With that low of mileage the fluids may be old, fluid replacement is usually done by mileage. If you look at the recommendation in the manuals, there is also general service recommended based on time.
So a full chassis service should be looked at. Grease all the grease fittings and there are a bunch, change all the fluids, oil, hydraulic oil, transmission, coolant, filters oil fuel, coolant, water separator, check tire dates, cracking of air bags.
I have tried to put together a list of things to check.
Speaking generally it will not be the engine / drivetrain that gives you problems with an older coach. It will be all the other stuff (refrigerator, furnaces, A/C, etc)
This question comes up a lot so this is a canned reply I have created, so it may not fit your question exactly.
Your inspection should start as you walk up to the coach, look to see if it is sitting squarely to the ground (suspension has not released the air out of the bags, and that the height adjustments on the air ride is keeping the coach at the right height (front to back and side to side (there are simple adjustments to the height sensors to correct this).
Also when you walk up to the parked coach look under it for any drips, leaks.
Do not leave the Dealership until you have been shown how to use the Motor Home, and actually exercised all the equipment..
This should include checking the fluids in your engine, running the Motor Home on shore power, being explained how to dump both the black and gray water tanks, make sure you have a hose to connect to the dump fixture and the dump port in the ground, run the internal 12 volt water pump, have them explain how to hook up to city water, run the furnaces, check the level in the batteries, run the jacks / leveling system, in the driver’s seat go over all the controls (put you hand on each one and operate it) , run the dash A/C, run the ceiling A/C units, make sure you water comes out of the faucets (check that you make hot water), run the micro wave, stove, oven, check all the lights, work the toilet, Shower, review the charging, solar, monitoring system, run the washer dryer.
Do not for the generator. Change the oil, air filter, fuel filter, coolant, and there is a spark arrester clean out you can do. This is a good You Tube video on the Onan 7500 generator.
https://youtu.be/CxqkHAAH818
Good You Tube video on coolant change
https://youtu.be/0LB5ZhvhXas
Drive it for as long as you can, highways, back roads.
The big thing is do NOT let them rush you out, the time to ask questions is before you leave, once you leave getting answers gets much harder.
If you do a good job here you will find faults and get the promise that they will fix the
problems in writing.
If you spend an hour you have not done it right, four hours is more like it.