Strange Towering Pillar of Hats

I love the Towering Pillar of Hats and all but it's not the first choice for a Strange all-class hat for me solely because of my level 52 one.

http://steamcommunity.com/market/listings/440/Strange%20Towering%20Pillar%20of%20Hats

Gonna ignore the $3.50 and below sales as they seem to be outliers.

http://puu.sh/q2YUY.png

Tax rates are once again based on a $100USD listing on SCM.

http://puu.sh/q2YXp.png calculations to key rates, $2.49USD on keys

Taking 1.6-1.9 keys, this should be fine.