There are no secret formulas,if there were the dealers probably started them as sales tools.Just remember to include everything like dollar exchange,entry fees,tax,past use like oil field housing etc. There is many of those around in Saskatchewan,the Dakotas,Montana and Alberta.They have had some tough winters and conditions.No matter what the price some one will have paid less and like me you feel better if you assume you paid too much.Nada, MSRP are useless in the real world of RV's.Have fun,then start the travel medical insurance dance.lol.Oh have you bought your one ton dually diesel already.