Thanks for all of your input. To clear up some confusion, I was looking for a rental agency that handles and sells retired class B's, similar to Cruise America and El Monte. I guess if they exist, they are small or new.
Fastpaddler, almost every retired class C I've seen on the internet have generators. Some charge if you use the generator, but it's there. You're right about awnings, though I'm seeing a lot of C's with awnings. Interior trim may not be as fancy, but they appear to be very nice.
From what I've seen on the retired rental threads, they all come with maintenance records, though it appears Cruise America may be slow in delivering them.
I've seen nothing about buying retired rentals from Camping World, but I know they sell them. Our local dealer has three 2012s for $40k, but I think they have around 70k miles; that's a lot for a two year old camper, about 35k per year.
Cruise America has a bunch of 2008 campers with mileage of 120k to 150k or so, which works out to 20k to 25k per year. And, from what I've read, CA is very good about maintaining their rentals. El Monte units have newer as well as older units with mileage of 6k to approaching 100k, and pricing seems reasonable for age/mileage.
I guess what it comes down to is that a buyer should pick carefully, and probably obtain an extended warranty. All of this is food for thought.
Don