If you bike to work, this is the perfect bag. This one is from but hardly used. On a whim, I bought it early this year, a few months before I retired (seriously!).
Originally retailing for over $240, this is a bomb proof briefcase/pannier that actually looks like a briefcase. It comes with a new rain cover (used once - it works!) - a $20.00 bonus
Here is a the original Arkel description:
You want to commute to work by bicycle, but need to carry important papers, files, and maybe even your laptop. Well, we had you specifically in mind when we designed the Briefcase. In appearance, it is a stylish, soft-sided attaché case with plenty of internal and external pockets to help you organize your day. Your laptop sits in a padded pocket, suspended in the bag, designed to protect your computer even in a fall. To secure the Briefcase to your bike, we included the same mounting hardware as our famous touring bags.
http://www.roadbikereview.com/cat/accessories/bike-bags/arkel/briefcase-pannier/prd_07_crx.aspx