Yes it is. Replaced by the R2a and R3a. You may still find one in stock somewhere, but take a look at www.cameraquest.com and www.robertwhite.co.uk for details and pricing. The differences between the R2, R2a & R3a have been discussed here before (take a look in the archive). They're also well documented on the camera quest website.
(A very happy Bessa R2 user)