Sale 1:

Sold for Smoking Panama (12) + 7 keys

http://www.tf2outpost.com/trade/28468252 - B/O of 19

Seller: http://backpack.tf/profiles/76561198021055079#!/compare/1473724800/1473811200

Buyer: http://backpack.tf/profiles/76561198139444147#!/compare/1473465600/1473811200

http://i.imgur.com/wMk76Td.png

http://i.imgur.com/JrMMlGw.jpg

http://i.imgur.com/1DfmBTk.jpg

X = 19

Sale 2:

Sold for Aces High Full Metal Drill (Mini at ~15 below) + ~2 keys in items

http://www.tf2outpost.com/trade/28314365 - B/O of 16?

Seller: http://backpack.tf/profiles/76561198228351596#!/compare/1468108800/1468195200

Buyer: http://backpack.tf/profiles/76561198099292422#!/compare/1468108800/1468195200

X = 16 (Capped by B/O)

Sale 3:

Quicksold for 15 keys

http://www.tf2outpost.com/trade/28334186 - B/O of 20

Seller: http://backpack.tf/profiles/76561198089777023#!/compare/1468281600/1468368000

Buyer: http://backpack.tf/profiles/76561198134797815#!/compare/1468195200/1468368000

X = 15

Aces High Metal Drill:

I couldn’t find a decent mini on the Metal Drill, however:

Seller: http://backpack.tf/profiles/76561198135388328#!/compare/1468540800/1468627200

Buyer: http://backpack.tf/profiles/76561198154604316#!/compare/1468540800/1468627200

Was bought from scrap.tf bot for 15 keys

Going with 15 for this.

Sellers:

20 keys:

http://www.tf2outpost.com/trade/28486957

http://i.imgur.com/4l0xgZ5.png

http://backpack.tf/u/76561198139444147

Sales at:

15

16

19

15 quicksold, excluding 15

Going with 16-19