I've owned and used more than one Six and they are fine cameras that work well. They often need servicing before use these days, but this can be accomplished by any competent repair tech at modest cost. They are not as common as say Hasselblads, but other than Hasselblad and Mamiya, NO medium format SLR system is particularly commonplace (in the USA at least). Lenses and accessories are all obtainable with a little patience and at moderate cost, most easily on eBay. If you have a lead on a good system at modest cost, I say go for it!