This needs a drop.

Classified ads at time of posting:

http://backpack.tf/classifieds/?item=Widowmaker&quality=11&tradable=1&craftable=1

1*1 key

2*1.06 keys (1 has killstreak)

1*1.07 keys

2*1.1 keys

2*1.12 keys

Unsolds at ~1.1 keys:

http://www.tf2outpost.com/trade/25284926 (1 week)

http://www.tf2outpost.com/trade/25375885 (Young)

http://www.tf2outpost.com/trade/25323456 (5 days)

http://www.tf2outpost.com/trade/25364300 (Young)

http://www.tf2outpost.com/trade/25224277 (2 weeks)

http://www.tf2outpost.com/trade/25237022 (Has specialized killstreak, 1 week)

http://www.tf2outpost.com/trade/25328386 (4 days)

http://www.tf2outpost.com/trade/25338398 (3 days, poorly bumped)

http://www.tf2outpost.com/trade/25195608 (2 weeks, poorly bumped)

Unsolds at 1.1 keys:

http://www.tf2outpost.com/trade/25376332 (Has killstreak, young)

http://www.tf2outpost.com/trade/25364065 (Young)

http://www.tf2outpost.com/trade/25351415 (2 days, never bumped)

Sellers at 1 key:

http://www.tf2outpost.com/trade/25362273 (1 day old)

http://www.tf2outpost.com/trade/25354761 (1 day old)

This is all I could find on Outpost that are valid