Proof:

http://backpack.tf/classifieds/search/id/52574d304cd7b8df248b456a (1 at 3, 1 at 3.22, LOTS at 3.33)

Unsold:

3.66 ref:

http://www.tf2outpost.com/trade/15655341 (<1 day)

http://www.tf2outpost.com/trade/15665963 (<1 day)

http://www.tf2outpost.com/trade/15599945 (2 days)

http://www.tf2outpost.com/trade/15275711 (2 weeks)

http://www.tf2outpost.com/trade/15640171 (1 day)

http://www.tf2outpost.com/trade/15602028 (2 days)

http://www.tf2outpost.com/trade/15620427 (1 day)

http://www.tf2outpost.com/trade/15648396 (<1 day)

http://www.tf2outpost.com/trade/15642847 (1 day)

http://www.tf2outpost.com/trade/15586554 (3 days)

3.55 ref:

http://www.tf2outpost.com/trade/15615480 (2 days)

http://www.tf2outpost.com/trade/15517691 (6 days)

3.44 ref:

http://www.tf2outpost.com/trade/15658580 (<1 day)

Selling:

3.33 ref:

http://www.tf2outpost.com/trade/15594737 (2 days)

http://www.tf2outpost.com/trade/15546001 (4 days)

http://www.tf2outpost.com/trade/15655829 (<1 day)

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

http://www.tf2outpost.com/trade/15636036 (1 day)

http://www.tf2outpost.com/trade/15659952 (<1 day)

3.22 ref:

http://www.tf2outpost.com/trade/15644962 (1 day)

3.11 ref:

http://www.tf2outpost.com/trade/15664834 (<1 day)

3 ref:

http://www.tf2outpost.com/trade/15649779 (<1 day)

http://www.tf2outpost.com/trade/15403265 (1 week)

http://www.tf2outpost.com/trade/15512579 (6 days)

2.66:

http://www.tf2outpost.com/trade/15605965 (2 days)

1.66 ref:

http://www.tf2outpost.com/trade/15655506 (<1 day)

As you can see, many of sellers at and below 3.33 ref. 3.66 no longer sells.

Cheers for voting : )