When I started looking for my next RV I looked very carefully at the the depreciation factor of buying new as opposed to used.
I had no intention of selling soon after buying but if it happened that I had to, then that was a big concern. That is why I opted to go to the used market.
After a lot of looking I opted to go with the
Former Rental option.
Here I got a RV that was reasonably priced, well maintained with documentation,a 1 year or 12,000 mile power train warranty and 30 days on all major appliances, very little depreciation and in almost new condition after the refurbish process.
After almost 7 years I have had no problems with the unit,just all the proper maintenance that is required of owning a RV.
This option may not be what you are looking for but there are
100 Members of this forum that have had very good luck with it and are pleased with their decision.