I want to pick up a yashicmat for my son on e-bay. It's really the only one I can afford right now. I used one years ago but it's been awhile. Is there any reason I need to go with the 124 or the 124G instead of a basic Yashicamat or the em model. As far as I can tell the Yashicamat has the Yashinon lense even if it's not the 124. The 124's are getting pretty expensive.
Also, on the off chance that I purchase a used one with a problem with the internal meter, or I am unable to purchase batteries for it, on a camera like this can I just go with an external meter? The batteries aren't powering anything else on it are they? As far as I know everything is completely manual.