Damnit all.

Thanks Cashew for indirectly correcting me.

Sale 1: Sold for 10 keys+Pink as Hell[2 keys]

http://backpack.tf/profiles/76561198124795841/#!/compare/1457769600/1457938800

10+2=12 keys

Sale 2: Sold for Voltaic Hat Protector Universal Translator[18 keys]+Strange Butcher Bird Grenade Launcher (Battle Scarred)[2.1 keys via mini]+Strange Carpet Bomber Stickybomb Launcher (Battle Scarred)[1.3 keys via mini]

http://backpack.tf/profiles/76561198064060046/#!/compare/1458284400/1458370800

18+2.1+1.3=21.4 rounding to 21 keys

Sale 3: Sold with Specialized Killstreak Purple Range Sniper Rifle (Field-Tested)+Strange Airwolf Sniper Rifle (Field-Tested)for Morning Glory Larrikin Robin

http://backpack.tf/profiles/76561197997915710/#!/compare/1455868800/1456041600

Using this for the Larrikin since there's no other sales usable for the Larrikin.

Sale 4: Sold for 15 keys

http://backpack.tf/profiles/76561198052982963/#!/compare/1456300800/1456473600

Sale 5: Sold for 16 keys

http://backpack.tf/profiles/76561198117478897/#!/compare/1458950400/1459036800

Mini on Grenade Launcher: https://gyazo.com/61f4512f2f7e0c325e4c27aa556bd66a.png

Mini on Stickybomb Launcher: https://gyazo.com/5aa79b92a86410b62954a7f02cb9cbde.png

I have sales at 12, 15, 16 and 21. 12 seems to be too low, 21 is too high. Taking the middle sales. Making this a range of 15-16 keys.