I have an 08 Tuscany, and the air intake is in the same position.
I routinely change the air filter every other year. I have had zero
issues, even in monsoon downpours with high winds blowing
on that side of the coach. There are enough baffles and other
design issues in the routing of the air inlet to prevent any
issues in this regard. I have 56,000 miles over 5 years.
Mine is a 4076 and it is the same colors as yours. If you have
records indicating that routine service was done, then you
have what appears to be a "new" coach. Once you get a handle
on the age of the tires, condition of the batteries (these should
have been/or must be changed at this time), you'll have a good
idea what you should pay for the coach. Thor Industries made
the coach, likely on a Freightliner chassis. There is no reason not
to consider buying it.