Sale 1: Deposit to Marketplace.tf

https://backpack.tf/item/2778037663

Sale 2: Marketplace.tf sale

https://backpack.tf/profiles/76561198248545632#!/compare/1592006400/1592265600

left the inventory between June 13 and June 16

Marketplace.tf sales: https://marketplace.tf/items/tf2/1115;5;u3032

(Untraceable): June 4 2020: $70 (key=$1.97, 35.53 keys) ~36 keys

(Sale 2) June 14 2020: $53 (key=$1.99, 26.63 keys) ~27 keys

(Untraceable) July 29 2020: $54 (key=$1.92, 28.13 keys) ~~28 keys

(Untraceable) August 19 2020: $54 (key=$1.79, 30.17 keys) ~30 keys

Going with 27-36 keys