They don't come up that often so get one while you can - this is a frame you will want to keep for life! It's not mine by the way but although I'm tempted, 2 would just be greedy considering how few there are.
TVT 92 Carbone / 8sp Dura Ace 7402
1980 531sl Stan Pike TT / Super Record
1991 Raleigh Royal 531st
Battaglin Carrera SL / Suntour Superbe Pro
Duell Professional SLX
Merckx Corsa Extra / Dura ace 7402