As Capt Kirk stated in an earlier post, the123 is a cult car by anyone'sdefinition. Just look at the enthusiasm in this forum. Valuable Collectable - not likely! Hold its value - yes, definitely!
I subscribe to a British magazine that rated stuff like 123's (both gas & diesel) along with oddball stuff like Citroen 2CV's, as potentially collectable, in the same vein as Alfa Romeos and Rovers were a few years back.
Honest! I read it somewhere. It Must Be True...