I bought a 4 year old Mobile Suites and took care of the well known bedroom slide and Kodiak brake caliper issues. I have a had the inverter go out and replaced the roof plumbing vents from being broken off. Misc adjustments on slides and tighten misc screws.
Bottom line the construction and materials used are in general of a higher quality with the MS than the want to be full time units.
I paid much less for a 4 year old MS than the similar size want to be units new at that time and now are worth around what I payed for mine and the newer one will be worth much less in a few years. After 1.5 years I can still get what I payed for mine.
To each their own!