Well sheesh, this isn't a strange weapon.

Selling at 2 keys:

http://www.tf2outpost.com/trade/14918877

http://www.tf2outpost.com/trade/14738252

http://www.tf2outpost.com/trade/14866423 - has an offer of 2

Selling at 2.2 keys:

http://www.tf2outpost.com/trade/14887784

http://www.tf2outpost.com/trade/14911310

http://www.tf2outpost.com/trade/14845714 - offer of 2.2

Please note that the offers are there to illustrate what people are willing to pay for.

Sold:

http://www.tf2outpost.com/trade/14915530 - 2

http://www.tf2outpost.com/trade/14914562 - 2.2

http://i.imgur.com/lALV3Dl.png?1 - 14 ref, ~ 2.2

http://www.tf2outpost.com/trade/14905374 - 2

http://www.tf2outpost.com/trade/14922390 - 2

There's a few that have been unsold for a while with prices close to the 2.4 range:

http://www.tf2outpost.com/trade/14919205

http://www.tf2outpost.com/trade/14745883

http://www.tf2outpost.com/trade/14576436

Every other trade is very ambiguous, or very overpriced.

http://backpack.tf/classifieds/search/id/521e60b5ba2536b9298b4569 - classifieds has quite a few 2 key sellers, and a whole bunch of people overpricing.

I guess two keys is still in the range, but 2.4 isn't anymore.