Many sales from $16-$23 (11 keys - 15 keys) averaging around $20(13 keys)

https://marketplace.tf/items/tf2/31024;5;u8

Sale for 11 keys

https://backpack.tf/profiles/76561198197292179#!/compare/1563580800/1563667200

Sale for 12 keys

https://backpack.tf/profiles/76561198087437472#!/compare/1565136000/1565222400

Sale for 13.5 keys

https://backpack.tf/profiles/76561198190583242#!/compare/1560384000/1560902400

Sale for 14 keys

https://backpack.tf/profiles/76561197961465738#!/compare/1566345600/1566432000

Sellers at 15 keys, buyers at 9 keys.

Believe it or not, all other versioners of this that were traded all had trades I couldn't 100% guarantee

So, We have a variety of sales averaging 11-14 keys (the 15 key $$ sale can be argued as 14), so I believe that is how this hat should be priced.