Sears offers the Craftsman 9" x 11" Sandpaper 50-Pack with Portfolio, model no. 22893, for $8.49. Plus, Shop Your Way Max members receive free shipping. (Not a member? It's free to sign up for a 90-day trial; otherwise, shipping adds $6.99. Free in-store pickup is also available.) That's the lowest total price we could find by $11, although we saw it for $1 less via pickup in September. This general purpose sandpaper includes 10 each of the following: 40, 60, 100, 150, and 200 grit.
Craftsman 9 x 11 in. Sandpaper 50-pk with Portfolio (22893) is also available at these stores