I hitchhike this topic because I have an opportunity for a good condition R4A for 500 € shipping included (in Europe, which makes a big difference compared to US stores or used R4As in the US, as I live in Europe myself and would have to pay customs). The best price for a brand new one here is 850 €.
I don't firmly need a R4A. Currently I have a R3A with 50 F/1.1, 35 F/1.4, 21 F/4 and 15 F/4.5. Surely the 50 F/1.1 is the main reason I have chosed the R3A, and it was my first lens (albeit it was not long till I started purchasing the other lenses). Now I'm kind of addicted to the 1:1 VF and could not replace the R3A I think. But admittedly, its framelines do not match at all my lens set. The R4A would far better match my lenses, and it would be nice for using the 21 and/or 35 alongside the 50 and/or 15 mounted on the R3A. Two bodies would also be perfect for walking around with two different film types at the same time.
As I don't firmly need it, but can see the benefits of purchasing it, the question is: is it a real bargain I should definitely leap on? I admit I'm a bit worried about the bulkiness of the complete RF set too. Carrying one body with two VFs and four lenses, or two bodies with one VF and four lenses (but two ready to use at the same time)? Difficult choices...