eBags has the Professional Weekender
(black only) on sale for 30% off the list price of $143.99 for a discounted price of $93.99 with free shipping using the promo code EMBNTEB0928. The 2 other colors (heathered graphite and brushed indigo) are $109.99 with the promo code. Based on camel(3x), the previous lowest price ever listed for this bag on Amazon was $109.99 on November 26, 2016. The alert I got indicated it's a mid-day flash sale, so I'm not sure how long it's going to last.
From the product page:
* 840D & 900D Twisted Poly
* Uber organized professional travel backpack - Limited Lifetime Warranty* against defects in materials and workmanship. NOTE: This is not a small bag. The size of this travel backpack is similar to a wheeled carry-on. It measures 21" H x 14" W x 8" D
*TSA recognized Travel Sentry Approved design fits laptops 2 x 12.5" W x 14" to 18 H and tablets 9 H x 10.5 W
*Includes a 3.5" x 13.25" x 20" clothing compartment and fits into the overheads of regional jets
*Easily converts from backpack to briefcase and includes vertical and horizontal luggage handle pass-thru panels
*Well-padded vented Airmesh back panel and contoured backpack straps with removable adjustable shock-load sternum strap
As a reminder, you can use your Amex $15 back on $75 offer plus additional cashback at the usual CB sites.
Also, the 30% off code appears to work on other items on eBags as well (obviously YMMV).