I saw a 1949 bus conversion at a RV and Trailer show in Palm Springs, CA, a week or so ago. It originally was a passenger bus but was converted to a motorhome in 1959 (says the owner).
The bus was so cool looking and it would be an asset for any park to have come in for the night just for the attention alone!
Sadly, some motorhomes are just not taken care of and just look bad. To me, it's not an age thing, but a a 'condition' thing.
In Las Vegas at the Las Vegas Motorcoach Resort, they do have a 10 yr. rule and is an all class A resort. A couple of years ago, they let a 20 yr. old Bluebird Wanderlodge in that was in excellent shape. It just happened that the owners were traveling 'RV brochure' developers and travel from park to park designing the brochures we receive on check-in.
Anyway, condition seems to be 'clicker'.
MM.