Sale 1:

Sold for ~8 keys in metal/items (trade hold)

Seller: https://backpack.tf/profiles/76561198167790780#!/compare/1575849600/1579392000

Buyer: https://backpack.tf/profiles/76561198347666710#!/compare/1579305600/1579392000

https://backpack.tf/item/8257143097

X = 8

Sale 2:

Sold for 8 keys

Seller: https://backpack.tf/profiles/76561198121830870#!/compare/1581120000/1581206400

Buyer: https://backpack.tf/profiles/76561198218784429#!/compare/1581033600/1581206400

https://backpack.tf/item/8257143097

X = 8

Sale 3:

Sold for ~6.5 keys to a quickbuyer (one key sold for metal)

Seller: https://backpack.tf/profiles/76561198347666710#!/compare/1579392000/1579564800

Buyer: https://backpack.tf/profiles/76561198121830870#!/compare/1579478400/1579564800

https://backpack.tf/item/8257143097

X = 6.5

Sale 4:

Sold to a bot for 6 keys

Seller: https://backpack.tf/profiles/76561198218784429#!/compare/1581033600/1581206400

Buyer: https://backpack.tf/profiles/76561198341171690#!/compare/1581120000/1581206400

https://backpack.tf/item/8257143097

X = 6

Marketplace:

https://marketplace.tf/items/tf2/31080;5;u29

Only sale here is way too cheap to be used. Excluding.

Other Sales:

https://backpack.tf/item/8257143097 (#1 & #2)

https://backpack.tf/item/8569184308 - marketplace

https://backpack.tf/item/8554282441 - marketplace

#1

Sold with Aces Convict for 13 keys?

https://backpack.tf/profiles/76561198341171690#!/compare/1581292800/1581379200

https://backpack.tf/profiles/76561198204215085#!/compare/1581292800/1581379200

Couldn’t find a B/O for either item so I won’t use this sale.

#2

Untraceable

https://backpack.tf/profiles/76561198204215085#!/compare/1582156800/1582416000

https://backpack.tf/profiles/76561198308225068#!/compare/1582416000/1582502400

Sellers:

https://i.imgur.com/1eb0qVO.png

https://backpack.tf/item/8569184308 - ~9.55 keys

Highest buyer is ~5.75 keys.

Sales at:

6

6.5

8 (2x)

Sales to buyers are as common as regular sales, and the buyers of the sales at 8 keys are the ones that re-sold for cheaper, so it should be fine to include sales to buyers.

Going with 6-8.