Proof:

http://backpack.tf/classifieds/search/id/525736594cd7b83d4d8b456b (1 for 1.33, lots for 1.66, lots for 2)

Unsold:

2 ref:

http://www.tf2outpost.com/trade/15637768 (1 day)

http://www.tf2outpost.com/trade/15640515 (1 day)

http://www.tf2outpost.com/trade/15667857 (<1 day)

http://www.tf2outpost.com/trade/15654437 (<1 day)

http://www.tf2outpost.com/trade/15593599 (2 days)

http://www.tf2outpost.com/trade/15385301 (1 week)

http://www.tf2outpost.com/trade/15348522 (1 week)

http://www.tf2outpost.com/trade/15666771 (<1 day)

http://www.tf2outpost.com/trade/15548020 (4 days)

http://www.tf2outpost.com/trade/15664201 (<1 day)

http://www.tf2outpost.com/trade/15641033 (1 day)

http://www.tf2outpost.com/trade/15546671 (4 days)

http://www.tf2outpost.com/trade/15526634 (6 days)

http://www.tf2outpost.com/trade/15588008 (3 days)

1.77 ref:

http://www.tf2outpost.com/trade/15618994 (1 day)

Selling/Sold:

1.66 ref:

http://www.tf2outpost.com/trade/15663174 (<1 day)

http://www.tf2outpost.com/trade/15665237 (<1 day)

http://www.tf2outpost.com/trade/15664175 (<1 day)

http://www.tf2outpost.com/trade/15661584 (<1 day)

http://www.tf2outpost.com/trade/15659025 (<1 day)

http://www.tf2outpost.com/trade/15651125 (<1 day)

http://www.tf2outpost.com/trade/15646846 (1 day)

http://www.tf2outpost.com/trade/15644841 (Sold)

http://www.tf2outpost.com/trade/15640970 (1 day)

http://www.tf2outpost.com/trade/15631871 (1 day)

http://tf2tp.com/trade.php?trade=9886160 (1 day)

1.55 ref:

http://www.tf2outpost.com/trade/15654987 (Sold)

http://www.tf2outpost.com/trade/15626625 (1 day)

1.33 ref

http://www.tf2outpost.com/trade/15646327 (Sold)

1.22 ref:

http://www.tf2outpost.com/trade/15667563 (Sold)

As you can see, many sellers at 1.66. 2 ref isn't really viable anymore. Thanks for voting : )