What is the rare portion?...(caliber I guess?)

Nice looking gun in any case..

That gun has been on there for 2 months and no one has purchased one yet. (actually none of the manycalibers available...)

Isn't that the same gun available here as well...
http://www.ozarkguns.com/rifles/sav/savage_16bss.htm
(priced reduced...doesn't imply too much demand...surprising)