Kaukko Direct via Amazon offers its Kaukko 15" Laptop Backpack with Wallet in 2line Grey for $39.99. Coupon code "S6VZXFXK" cuts that $19.99. With free shipping, that's $20 off and the lowest price we could find. It has a laptop compartment that fits up to 15.6" laptops and an outer compartment that holds items up to 18".

Don't want a wallet? It'a also available with a pen holder for $19.99 or with no accessories for $19.49 after coupon. All deals end May 24.