My learning of spot metering took place with the OM4 in 1984-1987 when I "jumped ship" to Canon. It is a beautiful camera and was a trailblazer for its time, very easy to use and understand, even if what was being displayed was quite small for its time. If it is expensive, I would say it is well worth gunning for at the expense because it has held its value very well. The alternative to the OM4 in medium format is any MF outfit and competent use of spot meter, meaning you'll need to skill up to get the best results through experience. There will be sorry times but I'm sure there will also be great times. There is no real substitute for learning through experience, and relying on a camera to do all the decision making for you can be potentially misleading.