Related Clues:

• Not abundant
• Undercooked, to some
• Like collectible coins
• Like 30 Across
• Way to cook steak
• Still red inside, as a steak
• Porterhouse specification
• More than noteworthy
• 'Still mooing'
• Collectible
• Not garden variety
• Like valuable stamps
• Prime rib order
• Like coconuts in Antarctica
• T-bone specification