I really don't lust for old bikes. Mostly because so few fit me well. (New bikes too. 3 of my 5 bikes are customs.) Plus I have the dream bike that while new, is very, very old school in concept. (And it won't be too long before it retrogresses to sewups.) That said, I've know that great riding bikes have been around forever. I rode a circa 1930 track bike around the Marymoor track outside Seattle. Clinchers and way too small but it was very obvious - size it right and throw on sewup and it would be a rocket!
And - Attainable C & V You Want but just Haven't Got. Breaking this down. "C" - Roman numeral for 100. "V", 5, "C & V" 105. Shimano 105. Yes quite attainable and I don't have much but I'm really not all that interested.