- RAREST
- Hardest to find
- Least common
- Most uncommon
- Quite scarce
- Least often seen
- Most valuable, perhaps
- Most scarce
- First served?
- Most desirable, maybe
- Most unusual
- Closest to extinction
- Least well done
- Closest to unique
- Found least often
- Supremely scarce
- Grilled the least, say
- Most valuable, likely
- Most red in the middle
- Superlatively scarce
- Most extraordinary
- Most red
- Most elusive
- Most interesting to a numismatist
- Least prevalent
- Seen least often
- Least cooked
- Least likely to be located
- Most prized by collectors
- Descriptor of the 1867 one-cent Z Grill stamp
- Toughest to find
- Hardest to locate
- Most infrequent
- Most hard-to-find
- Most sparse
- Red to the max
- Least likely
- Hardest to come by
- Most like a collectible
- Hardest to get hold of
- Most limited
- Least available
- AB negative, among blood types
- Most endangered
- Least likely to be found
- Least seen
- Least often encountered
- Most difficult to find
- Least rampant
- Most infequent
- .1 in exoticness
- Scarcest.
- Least plentiful.
- Happening least often.
- Most admirable.
- Of unusual excellence.
- Thinnest.
- Most excellent.
- Least dense.
- Hardest to obtain.
- Thinnest, as air.
- Most singular
- Most distinctive
- Most exceptional
- Choicest
- Like the best June day
- Least abundant
- Most precious
- That ___ gift . . . common sense: Meredith
- Most attenuated
- Least occurrent
- Least done
- Describing a numismatist's treasure
- Most collectible
- Like AB negative, of all major blood types
- Least known
- Least spotted
- Superlatively collectible
- Hardest to get
- Most prized, often
- Most valuable, possibly
- Of greatest interest to a bibliophile, maybe
- Like AB negative among blood types
- Like AB negative, among all blood types
- Closest to raw
- Hardest to find, perhaps
- Collector's superlative
- Least cooked, as steak
- Least encountered
- Like a numismatist's greatest treasure
- Most unique
- Reddest inside
- Least likely to be spotted
- Most seldom seen
- Most desirable to collectors, as a rule
- Most collectible, perhaps
- Like February 29, among all birthdays
- Superlatively red
- Like triples, among the four types of hits in baseball
- Toughest to track down
- Most coveted by collectors, perhaps
- Most valuable, to a collector
