I have the pricing sheet for the 2017s and when I priced out a 17 to be as close as my 15 Platinum it was almost $6,000 more. AND..... you can still option higher now with the 17s.
A Load 17 Platinum F350 will run you $78,000 sticker price.. a F450 Platinum will sticker at about $85,000.
LOL.. I'm glad I put under 10,000 miles a year on my 15 because I can't justify nor afford these prices.