If you search the web you can find invoice price sheets, not always the model you are looking for though. When I was shopping I found this site to use as a reference:
2016 Windjammer 3006WK
2010 Dodge Ram 2500, 4x4, Diesel, Front Hitch, Air Lift 5000 Rear Air Bags, (not really used, left over from our truck camper). Equalizer E4 1.4k/14k WD Hitch. TST 507 TPMS. Furrion FOS48TA Observation Camera. Garmin RV-760 GPS. Honda 2000i Genny, PI EMS-PT30C.