Some sellers sell for less than 1.66 and many have trouble selling at 1.66. Very very very little demand for this item, only 17 people looking to buy one. Proof below:

Selling less than 1.66:

http://www.tf2outpost.com/trade/11357746 (1.33)

http://www.tf2outpost.com/trade/11318302 (1.33)

http://www.tf2outpost.com/trade/11364355 (1.33)

http://www.tf2outpost.com/trade/11338191 (1.44)

http://www.tf2outpost.com/trade/11362247 (1.55)

http://www.tf2outpost.com/trade/10964702 (1.55)

Unsold 1.66:

http://www.tf2outpost.com/trade/11144014 (Mine, 1 week)

http://www.tf2outpost.com/trade/11065417 (1 week)

http://www.tf2outpost.com/trade/11029493 (1 week)

http://www.tf2outpost.com/trade/11172275 (6 days)

http://www.tf2outpost.com/trade/11029493 (4 days)

http://www.tf2outpost.com/trade/11270120 (3 days)

http://www.tf2outpost.com/trade/11274868 (3 days)

http://www.tf2outpost.com/trade/11301992 (2 days)

http://www.tf2outpost.com/trade/11287495 (2 days)

http://www.tf2outpost.com/trade/11315264 (1 day)

http://www.tf2outpost.com/trade/11330173 (1 day)

Bought less than 1.66:

http://www.tf2outpost.com/trade/10956721 (1.44)

NO DEMAND