MegaMacs offers the Kensington Contour Terrain 15" Notebook Backpack, model no. K63102US, for $19.99 plus around $10 for shipping. That's the lowest total price we could find by $2, although we saw it for $5 less last summer. It features water- and stain-resistant canvas construction, DropShield-padded accommodation for up to 15.4" laptops, elastic expansion bands, and side pockets. Deal ends May 29.