In 1986 I bought a new SR400.
A few years later a shop was blowing out Cannondale frame, supposedly due to the Klein lawsuit. Picked up a new 1988 Criterium frame and steel fork for $100.
Built it up with some 7400 parts I already had. It’s gone through a number of changes. It is now a triple (3x8) running M900 derailleurs. Only 7400 parts left are the brake calipers and pedals.
I never could find a replacement that was as much fun. Still riding it at 70.
John