Buyer had a listing at 2 keys 30 ref https://backpack.tf/profiles/76561198358296372#!/compare/1591747200/1591833600

Bot.tf stats confirm it: https://bot.tf/stats/item?def=1117&q=5&ef=Jarate%20Shock&craft=1&aus=0&ks=0&source=browser_script

Item was then deposited to Marketplace.tf

https://backpack.tf/item/2857451051

Sale on Marketplace.tf between July 8 and July 31

https://backpack.tf/profiles/76561198082177314#!/compare/1594166400/1596153600

Marketplace.tf sales: https://marketplace.tf/items/tf2/1117;5;u3029

(untraceable) May 30 2020: $5.94 (key=$1.94, 3.06 keys) ~3.05 keys

( https://backpack.tf/item/2857451051 ) July 22 2020: $8 (key=$1.94, 4.12 keys) ~4.1 keys

Xergoyf's extra proof:

https://imgur.com/a/D9u2YlP - bot.tf sale for 3 keys 20 ref

https://backpack.tf/profiles/76561198358296372#!/compare/1591912800/1591999200 - can see that amount in compares, was put on mp.tf right after by buyer

https://backpack.tf/profiles/76561198031007256#!/compare/1590278400/1592006400 - huge gap in buyers compare hence why nothing matches.

https://bot.tf/stats/listings/4O9X7Z8J - keys were 56.44

= ~3.25

Buyers at 2.65 keys exclude 2.6

Seller at 3.46 keys excludes 4.1 and 3.65

Going with 2.95-3.25 keys