As stated first have it checked out by a RV Tech to make sure that everything is in good working order.
From the mileage I would think that it may be a
Former Rental That is not a bad thing as more than 100 members here have one and are happy with them,that thread is long but there is a lot of good information there.
High mileage is not a problem if the RV has had proper maintenance,which most Former Rentals have had.
This is what I found on
Nada Pricing for that unit,it would seem that it is within the price range that they have.
2006 TIOGA 26Q CHEVY 6.0 WORKHORSE VORTECFormer El Monte RV RentalRetired Teamster Local 692Buying A Rental Class C