Re-suggesting. Using last month. Excluding sales from the last suggestion that are now over a month old.

Sale 1:

Sold for 10 keys

Seller: https://backpack.tf/profiles/76561198067649334#!/compare/1526428800/1526774400

Buyer: https://backpack.tf/profiles/76561198123271587#!/compare/1526688000/1526774400

X = 10

Sale 2:

Sold for Steaming Rubber Glove (Mini at 9 below)

http://www.tf2outpost.com/trade/29658614 - “50% off backpack.tf price”, not gonna matter here

Seller: https://backpack.tf/profiles/76561198139051069#!/compare/1526860800/1526947200

Buyer: https://backpack.tf/profiles/76561198043982289#!/compare/1526860800/1526947200

X = 9

Sales 3:

Sold for $15 on marketplace.tf

https://marketplace.tf/items/1111;5;u3007

15/1.96 = ~7.65

X = 7.5

Sale 4:

Quicksold for 7 keys + 13 ref

Seller: https://backpack.tf/profiles/76561198028320526#!/compare/1524441600/1524528000

Buyer: https://backpack.tf/profiles/76561198066105037#!/compare/1524441600/1524528000

X = 7.5

Sale 5:

Sold for 7 keys

Seller: https://backpack.tf/profiles/76561198048851745#!/compare/1525737600/1525824000

Buyer: https://backpack.tf/profiles/76561198243596364#!/compare/1525737600/1525824000

X = 7

Sale 6:

Bulk for Misty Skull Football Helmet

Seller: https://backpack.tf/profiles/76561198026941076#!/compare/1524355200/1524441600

Buyer: https://backpack.tf/profiles/76561198028320526#!/compare/1524355200/1524441600

Sale 7:

Sold for Terror-Watt Old Guadalajara

No outpost

Seller: https://backpack.tf/profiles/76561198043982289#!/compare/1526860800/1526947200

Buyer: https://backpack.tf/profiles/76561198134123166#!/compare/1526860800/1526947200

Gonna be a large outlier, excluding.

Steaming Rubber Glove Mini:

Sold for 9 keys

Seller: https://backpack.tf/profiles/76561198344933095#!/compare/1524787200/1524873600

Buyer: https://backpack.tf/profiles/76561198043982289#!/compare/1524787200/1524873600

X = 9

Not gonna bother with a proper mini on the glove, the sale’s gonna end up in the price range anyways, and even if it’s slightly higher, it would be better to stick with pure sales.

Sellers:

10 keys:

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

https://backpack.tf/item/2759436053

13 keys:

https://i.imgur.com/p3xkumP.png

https://backpack.tf/item/2760731942

14 keys:

https://i.imgur.com/R7a5KJo.png

https://backpack.tf/item/3791129775

50 keys:

https://i.imgur.com/K7Igk77.png

https://backpack.tf/item/2992185800

80 keys:

http://www.tf2outpost.com/trade/29175786

Offers:

http://www.tf2outpost.com/trade/29628629

Sales at:

7

7.5 (2x)

9

10

Excluding 14, given the 2-month old seller at 14 keys.

https://backpack.tf/item/2782388019 - 7.5 may have quicksold, but the sale at 7 took at least a week. Should be fine to disregard the “quicksell” part of the 7.5 key sale.

Going with 7-10.