Two-packs of Dry Erase markers are on sale for $.99 each at Walgreens right now. A few days ago, a $2/2 packs of said markers appeared on Coupons.com (it looks like it's already be gone). Now I don't even own a dry erase board and have no plans to purchase one, but I'm sure you can do the math here. I only printed out one coupon, but I figured if I happened to be at Walgreens and they happened to be in stock, well, why not? Today I had to pick up a prescription and sure enough, there were plenty of markers. So I got some. And technically, I saved…