Bought for 55 pure + Steaming Grimm Hatte + Steaming Pampered Pyro.

Proof:

(exchange of items)

https://backpack.tf/profiles/76561198120467518#!/compare/1537056000/1537228800 (seller)

https://backpack.tf/profiles/76561198122921879#!/compare/1537056000/1537228800 (buyer)

https://i.imgur.com/b8PPLbS.png (steam trade offer proof)

Prices for Hats (minis)

Steaming Pampered Pyro: 13.9 keys

http://prntscr.com/kvmabx (shows trade for 13.93 keys August 28)

https://marketplace.tf/items/5021;6/Mann%20Co.%20Supply%20Crate%20Key (keys were $1.88 USD Aug 28)

Steaming Grimm Hatte: 15 keys

https://marketplace.tf/items/383;5;u36 (sales stats for Grimm, median price rounds to about 15 keys when I bought it in April, since keys were $1.96 and the median prices for the last two sales is $30 USD)