What a pain.

Sale 1: Sold for Strange Australium Flame Thrower[18 keys]

http://backpack.tf/profiles/76561198168156023#!/compare/1460160000/1460419200

Sale 2: Sold for Stormy Storm Sober Stuntman[13 keys via mini]+6 keys

http://backpack.tf/profiles/76561198173968969#!/compare/1461801600/1461888000

13+6=19 keys

Sale 3: Sold for 17 keys

http://backpack.tf/profiles/76561198132038395#!/compare/1462320000/1462406400

Sale 4: Sold for 16 keys

http://backpack.tf/profiles/76561198132490031#!/compare/1462665600/1462838400

Sale 5: Sold for 17 keys

http://backpack.tf/profiles/76561198132038395#!/compare/1461542400/1461628800

Sale 6: Sold for 16 keys

http://backpack.tf/profiles/76561198092128134#!/compare/1460937600/1461024000

Sale 7: Sold for Strange Professional Killstreak Australium Tomislav[16 keys via mini(also has a part adding 3.5 keys)]

http://backpack.tf/profiles/76561198172607326#!/compare/1462665600/1463011200

16+3.5=19.5 rounding to 20 keys

Mini on Stuntman:

Seller at 13 keys https://gyazo.com/2e86e9413ede8ceb59ea7e16ae0ff0f9.png

Mini on Tomislav:

Seller at 16 keys https://gyazo.com/ca7e67871f1147102427d77ca3313b6d.png

I have sales at 16, 16, 17, 18, 19 and 20. Making this a range of 16-20 keys.