Related Clues:

• Like one in a million
• Like some collectible coins
• Roast beef request, perhaps
• Hardly commonplace
• Pink, say
• Still red inside
• Numismatist's classification
• Very hard to find
• Steak specification
• Most uncommon
• Once-in-a-blue-moon
• Special
• Like an ivory-billed woodpecker
• Far from plentiful
• Tuna order