Purchasing a low mileage, low use gas MH

Is the registration and license up to date? In this state, if unpaid, it get turns into big $$$.

Sounds like you have found a jewel! If stored outside in a hot arid climate, check all of the roof caulking to make sure it isn't dried out and cracking. Tires and rubber parts may be needing replacement.

Look at changing all filters and belts, tires including spare, service the transmission, fuel pump could be weak and fail shortly due to non-treated fuel. Fuel lines to generator and it's fuel pump could be bad if it sat with untreated 10% ethanol fuel. These are all things we had to address on our 2004 R-Vision B+ that had sat for 4 years, when we purchased it in 2002 with 8,000 miles. Also check the refrigerator for any recalls and if they were performed.

Seven years is a long time for rubber to go unused. I'd be concerned about belts/hoses etc being dried out in addition to the tires.

everything the first post listed , tires are in the $300. range EACH. double check for wet spots if you find ONE??? RUN.

Look for stains on the inside ceiling since caulking and sealant could have dried out and leaked. If there are none, great but plan on going over the entire roof to reseal all joints anyway.
Check the water pump since I assume they only used shore water rather than filling their water tank. Change water filter if there is one under the kitchen sink.
Tires are probably gone from age(2006 date?) and sitting in one position.
Check for any rodent damage and insect infestation.
Generator probably needs at least a carb rebuild due to not being prepped with Sta-Bill or other gas conditioning.
Check to see if the coach was Winterized since water would still be in the water lines if hooked to shore water. Check water heater and all other appliances for electric and LP operation.
CO and LP detectors are probably out of date.
You may consider new engine belts just to be safe and obviously check all hoses for deterioration.
Snug up roof top AC bolts.