Through 12/19 only, shop a selection of Items at buy one, get one free prices, plus, shipping is a $2 flat-rate fee. Stock up on items like this GNC Total Lean Lean Shake in Swiss Chocolate flavor to bring your subtotal from $66.98 to $33.94 at checkout, making each shake $16.70 for the quantity. The best price we could find on this shake anywhere else was $22. It is a meal replacement for weight loss delivering 9 grams of protein, vitamins, minerals and fat. Sales tax is charged in most states.