Why is this item dropping? :/

By now, I practically consider keys as 8 ref and I advise everyone else to treat keys at that price as well.

1.25

http://www.tf2outpost.com/trade/19767491

http://www.tf2outpost.com/trade/19784104

http://www.tf2outpost.com/trade/19769891

http://www.tf2outpost.com/trade/19772457

http://www.tf2outpost.com/trade/19680543

1.4 unsolds

http://www.tf2outpost.com/trade/19697985 - 6 days

http://www.tf2outpost.com/trade/19395135 - 3 weeks

http://www.tf2outpost.com/trade/19384820 - 3 weeks

Why use .25? Because 1/4 of a key = 2 ref. Why use exact decimals? I was inspired by this suggestion: http://backpack.tf/vote/id/524224044cd7b880148b4569

Feel free to counter / support my proof. Vote based on proof presented, not blindly!