I am wondering if I am figuring my travel trailer value correctly. NADA for 2016 livinlite camplite 21RBS travel trailer with all my options shows a price from $27,600-33,000. A dealer said it only retails for 23,000 and offered me 17,000. Can someone please tell me if I have the correct value? I don't want to get ripped off and I don't want to sell it too high?