• .1 in exoticness
• Closest to extinction
• Closest to unique
• Describing a numismatist's treasure
• First served?
• Found least often
• Hardest to come by
• Hardest to find
• Hardest to get
• Hardest to get hold of
• Hardest to locate
• Least available
• Least common
• Least cooked
• Least cooked, as steak
• Least done
• Least encountered
• Least known
• Least likely
• Least likely to be found
• Least likely to be located
• Least likely to be spotted
• Least observed
• Least obtainable
• Least often encountered
• Least often seen
• Least plentiful
• Least prevalent
• Least rampant
• Least seen
• Least spotted
• Least well done
• Like a numismatist's greatest treasure
• Like AB negative, of all major blood types
• Like the most valuable baseball cards, e.g.
• Most attenuated
• Most bloody
• Most collectible
• Most collectible, perhaps
• Most coveted by collectors, perhaps
• Most desirable, maybe
• Most difficult to find
• Most elusive
• Most exceptional
• Most extraordinary
• Most hard-to-find
• Most in the raw
• Most infequent
• Most interesting to a numismatist
• Most like a collectible
• Most precious
• Most prized, often
• Most red
• Most red in the middle
• Most scarce
• Most seldom seen
• Most unavailable
• Most uncommon
• Most unique
• Most unusual
• Most valuable, perhaps
• Most valuable, possibly
• Of greatest interest to a bibliophile, maybe
• Pinkest in the middle
• Red to the max
• Seen least often
• Superlatively collectible
• Superlatively red
• Superlatively scarce
• Superlatively unusual
• Supremely scarce
• Thinnest
• Toughest to find