Key = 5.55 ; 1.35 = 1 key + 2 ref

Sellers

http://backpack.tf/classifieds/search/359/1/0 - 1 at 1.1, another at 1.5 (out of range)

< 1.1

http://www.tf2outpost.com/trade/12330886 - 1 key (x2), 5 days

1.1

http://www.tf2outpost.com/trade/12256972 - 1 week

http://www.tf2outpost.com/trade/12454572 - 20 hours

http://www.tf2outpost.com/trade/12429972 - 1 day

1.2-1.3

http://www.tf2outpost.com/trade/12445381 - 1.35, 1 day

http://www.tf2outpost.com/trade/11649370 - 1.2, 3 weeks

http://www.tf2outpost.com/trade/12418011 - 1.3, 2 days

http://www.tf2outpost.com/trade/12284037 - 1.35, 6 days

http://www.tf2outpost.com/trade/12433353 - 1.2, 1 day

http://www.tf2outpost.com/trade/12464549 - 1.2, 10 hours

http://www.tf2outpost.com/trade/12428945 - 1.2, 1 day

http://www.tf2outpost.com/trade/12225320 - 1.35, 1 week

http://www.tf2outpost.com/trade/12449280 - 1.3, 1 day

http://www.tf2outpost.com/trade/12315643 - 1.35, 5 days

http://www.tf2outpost.com/trade/12282422 - 1.2, 6 days

http://www.tf2outpost.com/trade/12209103 - 1.25 ,1 week

1.4

http://www.tf2outpost.com/trade/12420170 - 2 days (8 ref)

http://www.tf2outpost.com/trade/12402301 - 2 days

http://www.tf2outpost.com/trade/12468955 - 7 hours (OR 7.55 ref, which is 1.35)

http://www.tf2outpost.com/trade/12352517 - 4 days

http://www.tf2outpost.com/trade/12299155 - 6 days

Sold

None >.<

Conclusion

Not enough sellers for less than 1.1 to drop lower end, 1.3-1.4 unsold, 1.2 seems to occur enough to be reasonable. No sales to help indicate a better price.

Help / Constructive criticism is appreciated ^.^