Answer: rarities

AnswerCrossword Clue
RARITIES

Once-in-a-blue-moon events

RARITIES

Blue moons and hen's teeth

RARITIES

Some valuables

RARITIES
Uncommon goods
RARITIES
Some collectibles
RARITIESThey're hard to find
RARITIESThings seen once in a blue moon.
RARITIESUncommon things.
RARITIESWhite elephants, for example
RARITIESListings in the Guinness book
RARITIESThey're scarce
RARITIESCollector's items