History 1: https://backpack.tf/item/4379118069

Deposit to marketplace.tf without being listed at a price

History 2: https://backpack.tf/item/7909339390

Deposited then withdrawn by seller. Then deposited again and sold

Marketplace.tf sales: https://marketplace.tf/items/tf2/1114;5;u3029

https://backpack.tf/item/7909339390September 24 2020: $3.50/1.84=1.90 keys LOWER THAN BUYERS

https://backpack.tf/item/7909339390 (most likely went to a private bp) September 30 2020: $9.99/1.83=5.46 keys

(UNTRACEABLE) October 21 2020: $8.99/1.84=4.88 keys

Buyouts unavaliable https://bot.tf/stats/listings?def=1114&q=5&ef=Jarate%20Shock&craft=1&aus=0&ks=0&source=browser_script

Excluding 1.9 because it's way lower than buyers at 2.48-2.81 keys leaving us with 4.88-5.46.

Median value is 5.17 so rounding to the nearest 0.5 keys, leaving us with 5-5.5

Going with 5-5.5 keys