Related Clues:
- Of interest to collectors, say
- Chophouse request
- Atypical
- Quite unusual
- Like a 1943 copper penny
- Out of the ordinary
- Facing extinction
- Answer to a waiter, sometimes
- Nearly extinct
- Still pink
- Uncommonly good
- Once-in-a-lifetime
- Color for the tickled
- '___ Cadillac' (1988 hit)
- Like hens' teeth, so to speak