Taking proof from previously failed suggestion: http://backpack.tf/vote/id/5479b975b98d88a1678b4899

Sale 1:

"I purchased a Towering Pillar of Hats with Circling Heart for a Towering Pillar of Hats with Ghosts (~4.8 * 0.9 = 4.32) + 40 keys (2.75) = 7.07 (can be rounded to 7.1) buds

So I feel like 7 buds is a pretty solid good price for this Hat.

Purchasing the Hearts Towering: http://i.imgur.com/DAxC37g.png

Hat's History: http://backpack.tf/item/1614320659

Mini for Ghosts Towering Pillar of Hats:

I purchased The Ghosts Towering Pillar of Hats for a Searing Plasma Towering Pillar of Hats (3.1*0.9 = 2.79) + 28 keys (2 buds) = ~4.7 buds

Purchasing the Ghosts Towering: http://i.imgur.com/1evS2RG.png "

Sale 2:

http://www.tf2outpost.com/trade/22971731 - another sale at 6

Done.