Using last month

Sale 1:

Bot.tf sale at 5 keys + 24 ref

https://i.imgur.com/U7XPtxi.png

https://backpack.tf/profiles/76561198344933095#!/compare/1522022400/1522108800

https://backpack.tf/profiles/76561198322560312#!/compare/1521849600/1522108800

Might be this sale, not sure.

X = 6

Sale 2:

Sold for 5 keys (RPS wasn’t involved)

Seller: https://backpack.tf/profiles/76561198002757046#!/compare/1523491200/1523577600

Buyer: https://backpack.tf/profiles/76561198133814282#!/compare/1523491200/1523577600

X = 5

Sale 3:

Sold for $8 on marketplace.tf

https://marketplace.tf/items/1112;5;u3008

Can’t find item history

8/1.98 = ~4.04

X = 4

Sale 4:

Sold for 4 keys

Seller: https://backpack.tf/profiles/76561198402957192#!/compare/1523059200/1523145600

Buyer: https://backpack.tf/profiles/76561198266876790#!/compare/1522972800/1523059200

X = 4

Sellers:

5 keys:

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

https://backpack.tf/item/2760752302

~5.18 keys:

https://i.imgur.com/2kyIqWB.png

https://backpack.tf/item/3186059438

~5.65 keys:

https://i.imgur.com/6D3tNsX.png

https://backpack.tf/item/3011478888

https://i.imgur.com/lO6qcgl.png

https://backpack.tf/item/3279193259

21 keys:

https://i.imgur.com/jhAF4DJ.png

https://backpack.tf/item/2784845369

Sales at:

4 (2x)

5

6

https://i.imgur.com/yr84g3k.png - Buyers at 4+ keys, excluding 4

Going with 5-6.