Sale @1.66: http://backpack.tf/profiles/76561198046135610#!/compare/1464048000/1464566400

Classifieds Sellers: http://imgur.com/qffE3FL

1x @1.66 (sold)

1x @1.77

1x @1.88

Classifieds Unsolds: http://imgur.com/a/BdOBY

2x young

2x 1 day

3x 2 days

2x 4 days

2x 7 days

1x 8 days

1x 23 days

2x 1 month

Outpost Sellers:

@1.66

http://www.tf2outpost.com/trade/28210125 - 1 day

http://www.tf2outpost.com/trade/28207847 - 1 day

http://www.tf2outpost.com/trade/28210257 - 1 day

Outpost Unsolds:

http://www.tf2outpost.com/trade/28205800 - 2 days

http://www.tf2outpost.com/trade/28201554 - 4 days

http://www.tf2outpost.com/trade/28197048 - 5 days

http://www.tf2outpost.com/trade/28191182 - 1 week

http://www.tf2outpost.com/trade/28189133 - 1 week

http://www.tf2outpost.com/trade/28186589 - 1 week

http://www.tf2outpost.com/trade/28160037 - 2 weeks

I think with 1 sale @1.66 and 3 OP sellers all over 1 day old (so not quicksells) @1.66 I can safely go with 1.66 flat.