Cheers for the help fellas. Resuggesting

https://backpack.tf/profiles/76561198106255568#!/compare/1542758400/1542844800 - My initial sale, 20 keys pure.

https://backpack.tf/profiles/76561198318365133#!/compare/1544313600/1544400000 - Sold for an electrostatic Furious Fukaamigasa and additions, totalling ~2.5 keys or so, making the sale 18.5 keys, rounding down to 18. Thanks to OddFuture for making me aware of the sale.

Fuka mini (Thanks to HeadShortDoge)

Sale 1

https://backpack.tf/profiles/76561198798016614#!/compare/1544054400/1544227200

https://backpack.tf/profiles/76561198116227477#!/compare/1543968000/1544054400

Sold for a Searing Plasma Rubber Glove + 3 Keys in sweets

should be used to drop there

Sale 2

https://backpack.tf/profiles/76561198008840775#!/compare/1540857600/1540944000

https://backpack.tf/profiles/76561198798016614#!/compare/1540857600/1540944000

Sold for a DP Festivizer (15)

Mini Festivizer:

https://backpack.tf/profiles/76561198002391950#!/compare/1541548800/1541635200

https://backpack.tf/profiles/76561198126985704#!/compare/1541548800/1541635200

Sold for 11 Keys + some small sweets

https://backpack.tf/profiles/76561198055622215#!/compare/1538697600/1538784000

https://backpack.tf/profiles/76561198798016614#!/compare/1538697600/1538784000

bulk

https://backpack.tf/profiles/76561198303166221#!/compare/1542067200/1542153600

probably scammed

https://backpack.tf/profiles/76561198303166221#!/compare/1541980800/1542067200

https://backpack.tf/profiles/76561198002391950#!/compare/1541635200/1542067200

Not sure but seems like it sold for an DP Archer Sterling (14) + 1 Key in sweets = 15

Micro Sterling:

https://backpack.tf/profiles/76561198254491860#!/compare/1539907200/1540166400

https://backpack.tf/profiles/76561198801119167#!/compare/1539907200/1540252800

Seems to have sold for 11 Keys + 3 Keys in items and ref = 14

Sale 3

https://backpack.tf/profiles/76561198074178367#!/compare/1540771200/1540857600¨

https://backpack.tf/profiles/76561198798016614#!/compare/1540857600/1540944000

Sold for a Pfetti Beret (compare weird since it sold quickly again)

Mini Beret:

https://marketplace.tf/items/180;5;u7

Sold for 28.99$ on the 19th of December

Keys are 1.65$

28.99/1.65= 17.56 Keys, rounding to 18.

Sales that we have: 15, 18 (16.5).