Too many unsold even at 1,66 ref for it to be considered a high range. Proofs below:

Selling for 1.33 ref:

http://www.tf2outpost.com/trade/8860430 (Selling 2, added)

Selling for 1.44 ref:

http://www.tf2outpost.com/trade/8857433 (have 2)

Sold one for around 1.55 ref:

http://www.tf2outpost.com/trade/8801162 (Armored Authority + 2 Scrap Metal)

Sold for 1.66 ref:

http://www.tf2outpost.com/trade/8703586 (1 or 2)

Selling for 1.66 ref:

http://www.tf2outpost.com/trade/8871988 (15 hours)

http://www.tf2outpost.com/trade/8820789 (2 days)

http://www.tf2outpost.com/trade/8551752 (2 weeks)

http://www.tf2outpost.com/trade/8808130 (3 days)

http://www.tf2outpost.com/trade/8523655 (2 weeks)

http://www.tf2outpost.com/trade/8835802 (1 day)

http://www.tf2outpost.com/trade/8855914 (1 day)

http://www.tf2outpost.com/trade/8724618 (1 week)

http://www.tf2outpost.com/trade/8689851 (1 week)

http://www.tf2outpost.com/trade/8630366 (1 week)

http://www.tf2outpost.com/trade/8768631 (4 days)

http://www.tf2outpost.com/trade/8501315 (2 weeks)

http://www.tf2outpost.com/trade/8829591 (2 days)

Unsold at 1.88 ref:

http://www.tf2outpost.com/trade/8762383 (5 days)

http://www.tf2outpost.com/trade/8780172 (4 days)

http://www.tf2outpost.com/trade/8234142 (4 weeks)

http://www.tf2outpost.com/trade/8827890 (2 days)

http://www.tf2outpost.com/trade/8801017 (3 days)

http://www.tf2outpost.com/trade/8569433 (1 week)

http://www.tf2outpost.com/trade/8846411 (1 day)

http://www.tf2outpost.com/trade/8241677 (4 weeks)