Buying an Orphan or Semi-Orphan--Any Concerns?

I'm sitting in a double orphan right now - 1996 Safari Sahara - a pre-Monaco Safari. No one makes the Magnum chassis, CAT is out of the OTR engine business, even the original 9R22.5 tire size is passé.

However, these coaches were so well built I would not be happy with anything new, even if I could afford it. I just like the look of the older coaches, especially a nicely polished Prevost or Bluebird. Nothing like the paper bag buses they sell today.