Focus Camera offers the Incase City Brief 13" MacBook Pro Shoulder Bag 2-Pack in Khaki for $139.99. Coupon code "CASE" cuts that to $29.99. With free shipping, that's the best price we could find by $110. They feature adjustable shoulder straps and accessory pockets.
There are plenty of great ways to spend your money, but you can safely leave these products on the store shelf.