Price of the Vintage Towering Pillar of Hats should decrease slightly. Evidence/Proof posted below. I will close this suggestion if there are too many disagreements.

http://backpack.tf/classifieds/search/135/3/0

2 of the 3 listings of 2 keys unsold for 6 Days

1 unsold for 2.4 Keys for 5 Days

Some Trades on Outpost

Unsold for 2.4 Keys or under

http://www.tf2outpost.com/trade/12592035 - 3 Hours

http://www.tf2outpost.com/trade/12156544 - 1 Week, has 45 in stock

http://www.tf2outpost.com/trade/12568567 - 14 Hours

http://www.tf2outpost.com/trade/12205620 - 1 Week

http://www.tf2outpost.com/trade/11672268 - 4 Weeks

http://www.tf2outpost.com/trade/12550674 - 1 Day

http://www.tf2outpost.com/trade/12474869 - 3 Days

http://www.tf2outpost.com/trade/12488342 - 2 Days

http://www.tf2outpost.com/trade/12407309 - 5 Days

Unsold for 2.2 Keys or under

http://www.tf2outpost.com/trade/12580619 - 9 Hours

http://www.tf2outpost.com/trade/12571852 - 13 Hours

http://www.tf2outpost.com/trade/12399822 - 5 Days, has 2 and an offer of a Vintage Safe n Sound (Approx. 2 Keys) 3 Days ago

http://www.tf2outpost.com/trade/12088806 - 2 Weeks, backpack.tf price

http://www.tf2outpost.com/trade/11991275 - 2 Weeks

http://www.tf2outpost.com/trade/12212210 - 1 Week, backpack.tf price

http://www.tf2outpost.com/trade/12380986 - 6 Days

Unsold for 2 Keys or under

http://www.tf2outpost.com/trade/12458237 - 3 Days

http://www.tf2outpost.com/trade/12477185 - 3 Days

http://www.tf2outpost.com/trade/11973471 - 2 Weeks, not sure if the seller is asking for 2 Keys OR 10 Refined or 2 Keys AND 10 refined :S

http://www.tf2outpost.com/trade/12391380 - 6 Days

http://www.tf2outpost.com/trade/12473446 - 3 Days

http://www.tf2outpost.com/trade/12515994 - 1 Day

http://www.tf2outpost.com/trade/12470996 - 3 Days

http://www.tf2outpost.com/trade/12501665 - 2 Days, 1 Key and 5 Refined

http://www.tf2outpost.com/trade/12474912 - 3 Days

http://www.tf2outpost.com/trade/12128479 - 2 Weeks

http://www.tf2outpost.com/trade/12385896 - 6 Days

Some Offers/Sales on Outpost

http://www.tf2outpost.com/trade/12412431 - Sold for a Vintage Hound Dog (Approx. 2 Keys) 4 Days ago