When we bought our 5th wheel in 2011 (the one in my sig line) the dealer in Irvine,Ca wanted $400 for the pdi. Of course that included some tp, an electrical adapter and propane. I said I wouldn't pay it. He explained that all dealers charged it but built it into the price. I proceded to buy my Cameo from Terrytown in Grand Rapids, Mi for $30K less with no pdi charge. I still got my propane and adapter but had to buy my own toilet paper. :)
The trailer was set up great and in 1 1/2 years of full timing have not had any problems.
Brian