I've seen lots of R4s here in LA. They often don't work, at least not fully. They usually have electronics issues. Clueless sellers (such as estate sale companies) ask big money for them regardless and try to sell them with "no returns." The Minolta XD cameras are very similar to the R4 which was a joint venture between Leitz and Minolta. A working XD costs a lot less than a working R4 and Minolta lenses are quite good.