Newegg offers the Timbuk2 Moby 15" Laptop Backpack in Dark Brown/Black, model no. 307-3-3003, for $24.99. Coupon code "EMCASKR83" cuts it to $19. With free shipping, that's $6 under our February mention and the lowest total price we could find by $19. It's compatible with laptops up to 15" and features an exterior zip, four slip pockets, one exterior pocket, and an on-strap bottle opener.