Ken, that may be hard. There is no standard retail markup between coach manufacturers. You probably will not find a United Specialties Retail Price Sheet, Renegade does not markup the chassis where other manufacturers do. Haulmark has a retail price sheet that does not relate to the others.
Your best bet is to compare apples to apples as best you can between any coaches that you may find. It is easier to compare different coaches by the same manufacturer, ask for the price sheets and just do the math comparison.
Also, don't compare retail markup of a typical class A, they have a much higher markup.
'18 Renegade 45'
Volvo Twin Screw, 500 hp I-Shift 12 Speed
30' Renegade Stacker Trailer