Amazon has Optimum Nutrition 100% Casein Protein 4 lbs for as low as $39.09 after clipping a coupon on the product page.
The only flavor available for $39.09 after coupon is the creamy vanilla.
Banana and Chocolate supreme are $41.77 each after clipping the coupon.
CLICK HERE to check it out. Make sure to clip the $8 coupon!