Take those price numbers with a grain of salt. I just priced a 2551, 'exactly' like our 2015-2551.
The price says the 2551 (now) comes standard with slide out with refrigerator & sofa. Then, lower down, I selected Slide out with Sofa... That added $5,625...I shouldn't have been able to select that. Lower down, it let me select leather sofa... Ca'ching!...add another $415.
Plus, things I believe used to be standard or part of the Convenience package are now extra (like the porch light) but they only add up to a few hundred dollars.
Anyway... New List price is $137,600.The list on my 2015 was $124,000. If you remove the $5,600 for the slide out (because I believe that's a mistake) that works out to $132,000 for today's dupe of my current PC.
Considering these are 2019 models... That's only up about $2k per year.
However, in 2015..you only paid 70% of list, I *believe* that now you pay 78% of list. That's a chunk of change!