few and far between
rare as rocking horse shit
uncommon
thin on the ground
scarce
geason
rare
ultrarare
rarer than hens' teeth
superrare
ultrararefied
sporadic
rare as a four-leaf clover
semirare
rareish
tight
rarefiable
unique
antrin
remarkable
supersubtle
rarefactional
rare as hen's teeth
nonrare
unlocatable
not uncommon
unknowable
subuniversal
inenubilable
different
fremd
last
queer as a clockwork orange
exceptional
unorthodox
offbeat
hellacious
same
searchless
miliary
unaccustomed
unexampled
indiscoverable
raresome
inimicable
unheard-of
unploughed
indescribable
hardly a
enigmatical