Even though it is just me and my wife, our Sams Plus membership is a net gain. Partly because my heart meds are cheaper (cash price) there with a plus membership than through insurance. It would be a net gain even if I bought nothing but my heart meds there. But we do gain from other products also.
Amazon pharmacy is beyond fantastic. No bulls#$$ either. I also buy a few things from Mumbai, India. It just takes a month to get to your door, so buy accordingly.