I suggest posting this at the forest river forums website. It is very active and there is a factory rep that regularly answers questions and knows about the construction techniques of those model years.
I've read complaints there about the attention to detail during construction at that site, although all of the manufacturers have issues.
Newer forest river C's have fiberglass roofs and Azdel composite walls to replace the Luan plywood used in older years.
Berkshire Hathaway (Warren Buffet) now owns it as well as coachman. There is a dealer near my house that sells new sunseekers. Forester is the same model except for added amenities on Foresters. I have noted factory defects on brand new models such as misaligned cabinets and sticking bathroom doors.
The quality overall reminds me of a Fleetwood Tioga and Jamboree if that is helpful. The focus is volume manufacturing, inexpensive labor, and fairly affordable for consumers. These come with tradeoffs.
Our prior Fleetwood before our current Chinook was a good entry level rig that we were fairly happy with, but the quality of our present RV is far better.
One of the most important things is to inspect how the prior owner has taken care of the roof, seam sealing around vents, etc and look for any water damage. If you get a chance to look at it during heavy rain, take it! I looked at several RVs with water damage and active leaks that the seller was either not aware of or hiding.
History: '08 View, '05 Chinook, '01 Jamboree 24D, '78 Apache Popup, 81 Komfort Tlr,
84 Mazda B2000 'w canopy,
Tent from wedding shower in '96