History 1: https://backpack.tf/item/5929001966

Unsold on Mannco.Store at ~26 keys https://mannco.store/item/16606

History 2: https://backpack.tf/item/5789478281

Sold on Marketplace.tf March 11: https://marketplace.tf/items/tf2/30615;5;u3029

$21.99/2.19=10.04 ~10 keys

buyout of 7 keys, capping at 7: https://gladiator.tf/listings/6006ac9d003fc094816639b2

Untraceable:

https://backpack.tf/profiles/76561198087947269#!/compare/1615939200/1616371200

https://backpack.tf/profiles/76561198248648360#!/compare/1616284800/1616544000

Other Marketplace.tf sale, can't find the history https://marketplace.tf/items/tf2/30615;5;u3029

January 13: $17.99/2.12=8.49 ~8.5 keys

There was a seller at 7 when the 8.5 sale happened: https://gladiator.tf/listings/5ffe8a8330f489414eaefef6

Seller at 7 was there for a while before it finally sold: https://gladiator.tf/listings/5fd544f98dd5521633514c90

Given this info, I think it would make sense to exclude 8.5 and go with 7 flat, 7 was also a higher sale that caps

Two buyers at ~7.5 now, this might be low