This one was posted a while back with only 18,000 miles. Looks like owner added portholes. The link in this link shows it without http://dennishouse.tv/2015/11/30/reindeer-and-the-roadmaster/
There is another one there http://www.midwestautocollection.com/web/used/Buick-Roadmaster-LT1-1996-Addison-Illinois/25008442/ Sweet.