https://www.amazon.com/Optimum-Nu…th=1&psc=1
Amazon.com has 5 lbs Optimum Nutrition Gold Standard 100% Whey Protein Powder(Various Flavors) buy one get one 50% off on sale 2 for $76.45 when you add a quantity of 2 to your cart and click subscribe and save. Shipping is free. Prices vary slightly depending on flavor.