RE: Amazon Prime supply, I noticed today that they sold their last cases (they had a count down 3 cases left, 2 cases left etc. etc) and now state that they are in stock, but delivery may take 1 or 2 extra days. Perhaps they need to get resupplied directly from Power Brands. I also noticed that the price went up from 23.83 case to 24.28 case for Prime members. New formula price increase..??