This hat is pretty damn sexy :3

Sale 1:

Sold for a Scorching Flames Ze Goggles

(59.5*0.9) = 53.55 rounding to 54 keys

http://www.tf2outpost.com/trade/25591435

Seller Before: http://backpack.tf/profiles/76561198053230820?time=1427353200

Seller After: http://backpack.tf/profiles/76561198053230820?time=1428130800

Sale 2:

Sold with a key and sweets ~2 for a Strange Bubbling Bonk Boy

(52 + 1 + (2*0.9) = 54.8 rounding to 55 keys

http://www.tf2outpost.com/trade/25487305

http://puu.sh/h7cy3/a400a68455.png

Notes:

Mini for the Strange Bubbling Bonk Boy

Sold with 4 keys for a bud and a Miami Nights Horrific Headsplitter (buds were 9.5 at the time)

(51.5*0.9) + 9.5 - 4 = 51.85 rounding to 52 keys

No outpost trade

Before: http://backpack.tf/profiles/76561198000850148?time=1426402800

After: http://backpack.tf/profiles/76561198000850148?time=1427526000

Conclusion:

Sales at 54 and 55 keys. Taking the final range at 54 to 55 keys.