Related Clues:

• Hardest to get
• Most valuable, possibly
• #1 in exoticness
• Most prized, often
• Most red
• Like the most valuable baseball cards, e.g.
• Most scarce
• Least done
• Found least often
• Closest to extinction
• Closest to unique
• Least cooked, as steak
• Hardest to get hold of
• Least ordinary
• Least obtainable