Hiya!

http://backpack.tf/classifieds/?item=Killing%20Gloves%20of%20Boxing&quality=14&tradable=1&craftable=1

2 Keys x1

2.5 Keys x1

2.53 Keys x1

Sellers -

http://www.tf2outpost.com/trade/21835491 2 Keys

http://www.tf2outpost.com/trade/21844085 2 Keys and 3 Ref = 2.38 Keys

http://www.tf2outpost.com/trade/21822529 2.5 Keys / 19.33 Ref

http://www.tf2outpost.com/trade/21807219 2.5 Keys

http://www.tf2outpost.com/trade/21266270 2.5 Keys

Solds -

http://www.tf2outpost.com/trade/21779606 Sold for ~16 Ref. Mid Range of 2 and 2.5 Keys. 16 Ref = 2.07 Keys

http://www.tf2outpost.com/trade/21784276 2 Keys and 1 Ref = 2.12 Keys

http://www.tf2outpost.com/trade/21519821 2 Keys and 2 ref = 2.2 Keys

http://www.tf2outpost.com/trade/21804433 2.5 Keys

http://www.tf2outpost.com/trade/21651744 2.5 Keys

Any Help/Feedback is appreciated!

Here's some Supporting Proof:

SCM: http://steamcommunity.com/market/listings/440/Collector%27s%20Killing%20Gloves%20of%20Boxing

1 KGB at 4.41. 4.41 / 1.89 = 2.3 Keys

1 KGB at 4.70. 4.70 / 1.89 = 2.4 Keys

3 KGB's at 4.75. 4.75 / 1.89 = 2.5 Keys

1 KGB at 4.78. 4.78 / 1.89 = 2.52 Keys

1 KGB at 4.79. 4.79 / 1.89 = 2.53 Keys