Amazon has the 5lb Sports Research Whey Isolate Protein Powder (56-Servings, Dutch Chocolate or Creamy Vanilla) on sale for $63 - 15% off coupon (check "Save an extra" box, eligible on first S&S order for this product)  - 10% off with Subscribe & Save (can cancel at any time) = $47 with free shipping. Roughly $9.40 per pound.

• 25g protein, 4g fat (3.5 sat) and 4g carbs (1g sugar) per serving.