Welcome John.
It’s hard to know why people sell their vehicles however the best measure is all of the people who retain their bikes and, as you will see as you meet more owners, the number of people who have multiple CCMs.
I’ve ridden most of the Spitfire series of bikes and the Bobber was the bike that didn’t appeal at first but once I’d ridden one I became an instant fan. They really comfortable and great fun too!