I don't know about you, but these dry erase markers are on my kids' school supply list every year. And they always need replacement markers throughout the year too. I think I sent 4-5 packs with my oldest son through all of last year. They are usually priced between $3.99-$5.99 depending on where you shop.
Through Saturday night at Walgreens, use their in-ad coupon to get them for only $1.99 a pack! What a deal! I am stocking up.