iTech Deals still offers the Golla Jess 14" Laptop Bag / Sleeve, model no. CG932, for $9.99 with free shipping. That's tied with last week's mention and the lowest total price we could find by $20. Compatible with 14" laptops (including the Apple MacBook Pro and Macbook Air), it features a zippered rear compartment, padded main compartment, and detachable shoulder strap.
There's a less expensive way, and then there's the way that works for you. The two may not be the same.