The bag for sale is a slightly early version of this model:
http://www.patagonia.com/us/product/patagonia-half-mass-messenger-bag?p=48315-0-920

The color is Grecian Blue and it is beautiful. I have only used it a few times and am interested in selling it to someone who would get more use out of it. It would be great for biking long distances or for short trips. It includes an internal removable laptop compartment that fits up to a 15'' laptop.

Asking $70. The original price is $89 plus tax and shipping (if applicable).