I like Cards

9 of clouds

Sellers: -

N/A

Sale 1)

https://backpack.tf/item/7956679342 https://marketplace.tf/items/tf2/825;5;u58

$49.99 / $1.84 = 27 keys

No buyout traced

Sale 2)

https://backpack.tf/profiles/76561198826392032#!/compare/1596326400/1596412800

https://backpack.tf/item/2183741584 https://marketplace.tf/items/tf2/825;5;u58

$49.99 / $1.90 = 26 keys

No buyout traced

Sale 3)

https://backpack.tf/profiles/76561198080179568#!/compare/1596240000/1596326400

https://backpack.tf/profiles/76561198121096016#!/compare/1596240000/1596412800 - Sold for 20 keys

Sale 4)

https://gyazo.com/76f75ef00fa44a88581d8575b07c2015 https://backpack.tf/item/2568445130

https://steamcommunity.com/market/listings/440/Unusual%20Hat%20of%20Cards

£32.08 / £1.74 = 18 keys

Sale 5)

https://backpack.tf/profiles/76561198850274253#!/compare/1599350400/1599436800 - Untrace

Sale 6)

https://backpack.tf/profiles/76561198129154174#!/compare/1598659200/1599782400 - Untrace

Sale 7)

https://backpack.tf/profiles/76561198137316819#!/compare/1591315200/1596326400

https://backpack.tf/profiles/76561198129154174#!/compare/1596153600/1597363200 - Using there

Sale 8)

https://backpack.tf/item/5373880097 https://gyazo.com/477c6481e00097736f6834f0db92c97b

https://steamcommunity.com/market/listings/440/Unusual%20Hat%20of%20Cards

Sales 9-12)

https://marketplace.tf/items/tf2/825;5;u58

$49.99 / $1.79 = 28 keys

$37.99 / $1.83 = 21 keys

$39.99 / $1.87 = 21 keys

$42.09 / $1.84 = 23 keys

Sales:

18, 20, 21, 21, 23, 26, 27 and 28

Calling 18 and 20 low due to buyers

I don't see why I'd exclude a higher sale as they're all so close together

Keeping 21 as it's supported by sales at 18 and 20

Thanks =)