James,
 
I think you could list at least three drupa as being uncommon; Drupa ambusta
from Japan, Drupa lobata from the Red Sea, and Drupa rubusidaeus from the
Indian Ocean/Pacific.  Some might also call Drupa clathra from the Pacific
uncommon.  There are undoubtedly others I haven't heard of or subspecies
that seldom make a dealer's list.  I think you will find their availability
varies (like a lot of shells) and what seems readily available this year is
tough to get next year -- or vise versa.
 
Tom Eichhorst in New Mexico, USA
 
James M Cheshire wrote:
 
> Dear all, what species of Drupa are considered uncommon?
> When I start collecting a family of shells I normally tackle the harder
> to
> find species first.
> Let me know.
>
> P.S. I just got my own signiture, how do you like it?
>
> If I ever had the honor to name and describe a cone species,
> I would call it the ice cream cone! Kind Regards James
>
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