AltaTac via eBay offers the Lewis N' Clark 15" Sport Backpack in Black or Blue, model no. 9110, for $17.95 with free shipping. (Botach Tactical via eBay charges pennies more.) That's tied with our mention from two weeks ago and $28 under the lowest total price we could find today for a similar backpack elsewhere. It features 1,680-denier and and 420-denier polyester construction, water-resistant coating, air mesh back panel, and more.