Probably for the same reason you like it, it has a nice floor plan that fits people's needs and it is light enough that it can be towed easily with a mid-size pickup/suv. I know a few years ago when we were looking for a small 8 foot popup to pull behind my Jeep Wrangler we had a hard time finding one because the small popups were in such high demand because they can be towed behind smaller vehicles. We could find plenty of 10 & 12 footers near us for a reasonable price but the small ones were either gone quickly or they were asking premium prices for them. After months of searching we eventually found one at the end of the season from a dealer who reluctantly sold it to us for an offer below his asking price after it sat on his lot for a few weeks, I ended up having to travel over 6 hours away to buy that camper.
Good luck with your search, hopefully you will find one soon.
2008 Fun Finder X240
2003 Chevy Avalanche 2500