@Darkhorse, if you're considering a PBR MK.I (the Tamiya kit is the Mk.II) There is only the Masterpiece Models offering and it is out of production.
HOWEVER, Kitlinx has it in their clearance sale for half off the $130USD price. Click the image as it is in stock, at the moment I post this, for $64.99USD:

HOWEVER, Kitlinx has it in their clearance sale for half off the $130USD price. Click the image as it is in stock, at the moment I post this, for $64.99USD: