Starting Sunday at Walgreens, Green & Black's chocolate bars are on sale 2/$4. If you use the Green & Black's coupon on Facebook, you can grab the bars for just $1.50 each
Green & Black's Chocolate Bars $2.00
-$.50/1 Green & Blacks Coupon
If you buy them individually they will be $2.39 or $1.89 after coupon.
Note: The coupon may only allow one print, so you will end up spending $1.75 each when you buy two. Still a great price, but not the $1.50 each as mentioned above.