Alternative... Try a Grande Sugar Free Iced Latte instead (80-100 cals depending on milk, 10 grams sugar, 12 grams carbs)
It's not as fluffy and pretty and not 1/2 off but is it really savings if you need to use that money for a Dr's co-pay in the future. Or stay home make yourself a Coffee Protein Shake. Several to choose from: Chike makes a great High Protein Iced Coffee, Big Train's Fit Frappé is another, and Click. All tasty, give them a try, see which is your favorite and check their stats to see which work in your plan.