The Osprey Porter Travel Pack is on sale at Sierra.com for $69.99. This is a great price for a pack that I love. Well designed and high quality. You'll need to do a search for Porter to locate the pack as the site isn't allowed to display the brand name in this case.
Edited to add link: https://www.sierra.com/osprey-porter-46-l-backpack-porter-black~p~46ttu/?filterString=newproducts~14%2F