http://backpack.tf/classifieds/search/id/52b4adc64dd7b84c188b4567 (1 for 1.33, 2 for 1.66, 2 for 1.88, lots for 2, lots for 2.33)

Proof:

Unsold:

2.33 ref:

http://www.tf2outpost.com/trade/16801705 (1 day)

http://www.tf2outpost.com/trade/16858377 (<1 day)

http://www.tf2outpost.com/trade/16858313 (<1 day)

http://www.tf2outpost.com/trade/16853490 (<1 day)

2.22 ref:

http://www.tf2outpost.com/trade/16809882 (1 day)

Selling:

2 ref:

http://www.tf2outpost.com/trade/16858380 (<1 day)

http://www.tf2outpost.com/trade/16856262 (<1 day)

http://www.tf2outpost.com/trade/16856241 (<1 day)

http://www.tf2outpost.com/trade/16853092 (<1 day)

http://www.tf2outpost.com/trade/16852582 (<1 day)

http://www.tf2outpost.com/trade/16852547 (<1 day)

http://www.tf2outpost.com/trade/16851399 (<1 day)

http://www.tf2outpost.com/trade/16851341 (<1 day)

http://www.tf2outpost.com/trade/16850503 (<1 day)

http://www.tf2outpost.com/trade/16849929 (<1 day)

http://www.tf2outpost.com/trade/16844470 (<1 day)

http://www.tf2outpost.com/trade/16831147 (<1 day)

http://www.tf2outpost.com/trade/16829517 (<1 day)

http://www.tf2outpost.com/trade/16828281 (<1 day)

http://www.tf2outpost.com/trade/16821811 (1 day)

http://www.tf2outpost.com/trade/16815241 (1 day)

http://www.tf2outpost.com/trade/16808622 (1 day)

http://www.tf2outpost.com/trade/16802675 (1 day)

http://www.tf2outpost.com/trade/16801535 (1 day)

http://www.tf2outpost.com/trade/16799323 (1 day)

1.88 ref:

http://www.tf2outpost.com/trade/16823855 (1 day)

The sheer volume of 2 ref sellers outweighs any for 2.33.

Thanks for voting : )