It is possible to sell these for a weapon each(and even a scrap in some cases). There are still a few trades out there for <0.05, so leaving the low range as is for now.

Sales at 0.05 or above

http://www.tf2outpost.com/trade/12919549 - offered 1 scrap for a brown

http://www.tf2outpost.com/trade/13476598 - selling 2 for a scrap, had a willing buyer but apparently didn't follow through

http://www.tf2outpost.com/trade/13455710 - sold for a weapon per crate

http://www.tf2outpost.com/trade/12723494 - selling for a wep each, may have sold some? has many empty spaces in inventory

http://www.tf2outpost.com/trade/12735529 - selling for a scrap, has sold all his browns

http://www.tf2outpost.com/trade/13455710 - sold some browns for a weapon each

http://www.tf2outpost.com/trade/13678704 - has sold some sets which include browns for a weapon per crate, also sold at least 9 others for a wep each

http://www.tf2outpost.com/trade/12532015 - has sold a ton of all types at a weapon each, sold many browns a week ago, as well as a brown, blue, and orange for a rec 2 weeks ago

http://www.tf2outpost.com/trade/12841429 - sold all his browns at a wep each

http://www.tf2outpost.com/trade/13736597 - sold out on browns at a scrap each

http://www.tf2outpost.com/trade/12925601 - sold out on browns at a wep each

http://www.tf2outpost.com/trade/12574422 - sold at least 1 brown for a scrap

http://www.tf2outpost.com/trade/13139282 - sold browns at a wep each

http://www.tf2outpost.com/trade/12622843 - sold out browns at a wep each