Fixed to include the first sale of it.

Thanks to Apollothelion and Vicentius for confirming that this big a range is fine on 2019 halloween effects atm.

Sale 1: 160 pure

https://backpack.tf/profiles/76561198108331387#!/compare/1573603200/1573689600

https://backpack.tf/profiles/76561198035128943#!/compare/1573603200/1573689600

Compares don't properly show how much it sold for, so I went to ask both the buyer and seller what price was paid for it as well as how long it was for sale for:

Buyer's price confirmation: https://i.imgur.com/YtD6Vof.jpg - Mobile SS I'm sorry :(

Seller's price confirmation: https://i.imgur.com/HN2Kxzz.png

Sale 2: 300 pure

https://backpack.tf/profiles/76561198017288092#!/compare/1573689600/1573776000

https://backpack.tf/profiles/76561198108331387#!/compare/1573689600/1573776000

Hasn't moved or been on the market since the 2nd sale.

Taking 160-300 keys.