3 Sales:

Sale 1: Sold for a ★ Classic Knife | Blue Steel (Well-Worn). https://csgo.steamanalyst.com/id/306761485. Price = ~ 78 csgo keys. (Going by lowest seller on market: 167,05 / 2,03 = ~ 82.2 TF2 keys). Taking 80 keys. Was also my buyout.

My end: https://backpack.tf/profiles/76561198289040457#!/compare/1575244800/1575331200

His end: https://backpack.tf/profiles/76561198134533516#!/compare/1574899200/1575331200

Sale 2: I bought it in a backpack. Bulk.

His end: https://backpack.tf/profiles/76561198153735063#!/compare/1570665600/1575072000

My end: https://backpack.tf/profiles/76561198132808609#!/compare/1575072000/1575158400

Sale 3: https://marketplace.tf/items/tf2/255;5;u84 https://backpack.tf/item/3141658063 Other sale was for 95$. Taking key price of 1.8$ at that time. 95/1.8 = ~ 53. Buyout of 50 https://bot.tf/stats/listings/Y9G6VVRX.

Sale 2 will be outlier due the buyer quickselling his backpack. Taking a range of 50-80

Thanks to Master Big Daddy Crimson, Lord of the 7 Crimson Lords, The Ruler of Crimson Underworld and the Supreme Demon Lord... and Xergoyf