Nancy, take a look at this link for NADA used RV values
Prices, Used Values & Specs for Camping Trailers from NADAguides
Look for the Flagstaff/Forest River.
I ran into similar issues with my County tax assessor trying to value my Sunseeker. Couldn't find Forest River anywhere, but tried Sunseeker and found them under "Sunseeker by Forest River". Go figure.
Hope this helps.
Chris in Virginia
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2006 Sunseeker 3100SS/LTD
2008 Smart Passion Cabriolet TOAD
1986 Honda Helix (Original owner)