Credits for Vincentius

Sale One: $51 on MP on Dec. 7[b]

https://marketplace.tf/items/30753;5;u8

Keys were $1.7 that day[u]

https://imgur.com/a/vmLtmTg

51/1.7= 30 Keys

[b]Sale Two: 32 Keys

https://imgur.com/a/myseRnx

[u]Note for sale two: The buyer immediately gave the hat to his friend for free of charge, excluding

Sale Three: Hat+Two Keys for a Spec KS Australium Rocket Launcher

https://backpack.tf/profiles/76561198269484722#!/compare/1540425600/1540512000

Counting this sale as 31 Keys pure since Buy orders of the Aussie RL are at 32 and Sell orders at 34.

32-2=30

34-2=32

Sale Four: Sold with Three Keys for a Starstorm Insomnia Hellmet

https://backpack.tf/profiles/76561198407541175#!/compare/1540684800/1540771200

mini for the hellmet

https://backpack.tf/profiles/76561198281740189#!/compare/1541721600/1541808000

Sold for Molten Mallard Brain Bucket, priced at 30-32, repriced three months ago at time of this exchange, effectively making the price of the Hellmet 31 Keys.

31-3=28

Total sales at 30, 32, 31, and 28