>>20096293 issues
A: vintage bonded carbon or aluminium forks are now mostly at the age to be retired, not re-specced with a nice build. It's probably not viable to replace either. I'd say a frameset is practically worthless if it doesn't come with a nice fork and most of them will not. A replacement fork is usually more than the entire price of a nice used frameset and devalues the frame.
B: Same thing with the cannondales with the funky shotback dropouts. Really closely scrutinize on condition and kinda sketchy at this point.
C: Third thing is that most of those bikes will be longer than they are tall, designed for quite an aggressive position, and this doesn't suit most casual riders and adapting to it with a meme stem ruins the aesthetics.
They're mostly very nice bikes, actually the last boomer i spoke to about his CAAD said he preferred it to the Klein he also bought new back in the day because it rode better.
But you're shooting for a narrow niche of either a very good example, or a very cheap beater.
