from my experience, and maybe from my preference, 25-inch bike boom frames tend to bring best price, partly because they're the cost-effective alternative to a 64 cm Rivendell (Waterford, etc.).
The older geometry with shorter top tubes tend to fit me better - I'm all limbs and a shorter torso than most people my height (6'3").
That's why I'm still riding my '76 Raleigh ('77 model) - it's the benchmark fit for me - if I'm building another bike, I take measurements from it to pick stem length, bar reach, etc.