Related Clues:

• Not as available
• More precious, perhaps
• More valuable to a collector
• More pink, in a way
• More desirable, to a collector
• In shorter supply, such air's clear, oddly
• Like perfect games vis-à-vis no-hitters
• Painter behind spilling first rate thinner on the ground
• Like safeties vis-à-vis field goals
• More collectible, perhaps
• Thinner, as air
• Closer to being raw
• Less prevalent
• Like 1913 Liberty Head nickels, vis-a-vis 1913 Buffalo nickels
• Like triple plays, vis-a-vis double plays