Classifieds at the time of posting:

2 x 1.3

1 x 1.4

1 x 1.5

4 x 1.55

Sellers @ 1.3 keys:

http://www.tf2outpost.com/trade/23149118

http://www.trade.tf/trade/479496075

Sellers @ 1.4 keys:

Young:

http://www.tf2outpost.com/trade/23191898

Sellers @ 1.5 keys:

http://www.tf2outpost.com/trade/23159210

http://www.tf2outpost.com/trade/23164552

Sellers @ 1.55 keys:

http://www.tf2outpost.com/trade/23168457

http://www.tf2outpost.com/trade/23173394

http://www.tf2outpost.com/trade/23110866

http://www.tf2outpost.com/trade/23101165

http://www.tf2outpost.com/trade/23169154

Young:

http://www.tf2outpost.com/trade/23195080 x 2

http://www.tf2outpost.com/trade/23192321

Unsolds @ 1.7 keys:

http://www.tf2outpost.com/trade/23069483 - 1 week

http://www.tf2outpost.com/trade/23060640 - 1 week

http://www.tf2outpost.com/trade/23140293 - 4 days

http://www.tf2outpost.com/trade/23153484 - 3 days

http://www.tf2outpost.com/trade/23178735 - 1 day

Unsolds @ 1.8 keys:

http://www.tf2outpost.com/trade/23064420 - 1 week (painted)

http://www.tf2outpost.com/trade/23184163 - 1 day

http://www.tf2outpost.com/trade/23181169 - 1 day

http://www.tf2outpost.com/trade/23184937 - 1 day

Unsolds @ 1.9 keys:

http://www.tf2outpost.com/trade/23126009 - 4 days

http://www.tf2outpost.com/trade/23184163 - 1 day

Unsolds @ 2 keys:

http://www.tf2outpost.com/trade/23062327 - 1 week

http://www.tf2outpost.com/trade/23042792 - 1 week

http://www.tf2outpost.com/trade/23012004 - 1 week

http://www.tf2outpost.com/trade/23002945 - 1 week

http://www.tf2outpost.com/trade/23092660 - 6 days

http://www.tf2outpost.com/trade/23132937 - 4 days

http://www.tf2outpost.com/trade/23133069 - 4 days

http://www.tf2outpost.com/trade/23124035 - 4 days

http://www.tf2outpost.com/trade/23132827 - 4 days

http://www.tf2outpost.com/trade/23135228 - 4 days

http://www.tf2outpost.com/trade/23154232 - 3 days

http://www.tf2outpost.com/trade/23148877 - 3 days

http://www.tf2outpost.com/trade/23170078 - 2 days

http://www.tf2outpost.com/trade/23187196 - 1 day (painted)

http://www.tf2outpost.com/trade/23182279 - 1 day

http://www.tf2outpost.com/trade/23173974 - 1 day

Unsolds @ backpack.tf price:

http://www.tf2outpost.com/trade/22909127 - 2 weeks

http://www.tf2outpost.com/trade/23159203 - 2 days

Ideally 1.55 should be rounded off to 1.6 but the error is a bit high. Even if it is rounded down to 1.5 the error is same. Since there are some sellers @ 1.5 or below, 1.5-1.6 should cover most of the trades.