I kicked the tires on a used Artic Fox 1150 camper at a dealership. Was ready to pull the trigger but I wanted to load it on my 99 F350 Dually to see how it drove. They wouldn't go for it (not sure I would blame them) and so I walked out. Bought my Bigfoot camper a few weeks later and have been happy ever since.
Frankly I don't think I would want to be a camper dealer. The vast majority of people that might walk on the lot don't have the type of truck necessary to haul today's huge campers without at least a few modifications. You would always be running the risk of an unhappy customer who demanded they purchase something their truck was incapable of hauling and then two weeks later come back with buyer's remorse and expecting the dealer make them happy.
On the flip side, I do wonder why modern campers are so heavy to begin with. Sure, there are lots of little pieces that all add up but with today's advances in materials and 3d printing, one would think campers would be getting lighter compared to models from a decade or two ago. Even my fiberglass Bigfoot really doesn't have much of a weight advantage that I would have expected out of it.