Re-suggestion

Closing the range gap, keeping the price

Buyers:

No one is buying at any price over 15, couldn't find anything but quickbuys.

Sellers:

https://steamcommunity.com/market/listings/440/Unusual%20Engineer%27s%20Cap // ~£30 / 14.5 Keys

https://backpack.tf/classifieds?item=Engineer%27s%20Cap&quality=5&particle=30 // 13.5 Keys

Solds:

Sold 1:

https://backpack.tf/profiles/76561198317717624#!/compare/1497830400/1498262400 // 11 Keys / Most likely QS

Sold 2:

https://backpack.tf/profiles/76561198143097099#!/compare/1498176000/1498262400 // 1:1 Blizzardy Storm Big Country

Blizzardy Storm Big Country = ~14.5 Keys, but has a one year outdated price but is selling around 14 - 15 keys currently.

https://backpack.tf/stats/Unusual/Big%20Country/Tradable/Craftable/30

http://www.tf2outpost.com/search/270983996 // B/O of 15 keys

http://www.tf2outpost.com/trade/29250520 // Quickselling at 12 keys