For sale is a perfect condition Chrome Industries rolltop messenger bag. If your not familiar with this company, check them out. They make bomb proof bags and packs with cyclists in mind.
This one is waterproof, has a very strong Velcro flap over the waterproof inside and a zipper for dry goods on the outside. There is a spot on the back for a u-lock and the seatbelt strap and buckle are very comfortable. Fits my iPad, phone and a book etc.
Selling as I'm after something a bit bigger.
$60 obo (lowballs will be ignored) and u-lock not included.