To be honest, they are all pretty rare now as they aren't made any more. However, the Joker seems to be amongst the rarest! :)
The rarest lego minifigure for series 5 is the LUMBERJACK
The Fisherman
The most rare minifigure in series 8 is the red cheerleader!
rarest minifigure is boat
Probaly the genie
Probably proffer quirell
The modern minifigure was introduced in 1978.
On ebay.com
buy
no
basiclly you cant only if that guy sells you his own. Jango is one of the rarest minifigure in the world. I have one and i spended more than 100 us to get it.
whats the oldest Lego in the world