A models were less popular it seems, due to regular fear of electronics. They are less common and might be easier to sell now, because they are all not manufactured anymore.
I really wanted R2A, but they were not available new anymore, so I went for new R2M as backup for old beater Leica M4-2 which I used as film rangefinder most.
Bessa RFs in M mount are less expensive alternatives to Leica M cameras. It used to be really cheap alternative, but then price on them increased.
R2A is Leica M7 alternative. Those who choose them shows constant perfect exposures on street photos.
All Bessa RF cameras are not very durable on exterior wear. If in use it is preferable to have half-case.
For some of us focusing of SLR rig is most awkward experience, BTW.