Sales 1 & 2:

Sold for $33.33 and $15 on marketplace.tf

https://marketplace.tf/items/1110;5;u3005

$15 is gonna be way too low, excluding.

http://manicbot.me/keyprice/?at=2018-08-10 - 33.33/1.87 = ~17.82

X = 18

Sale 3:

Sold for 15 keys

Seller: https://backpack.tf/profiles/76561198305676157#!/compare/1533859200/1533945600

Buyer: https://backpack.tf/profiles/76561198023154147#!/compare/1533686400/1533945600

https://backpack.tf/item/6528224287

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

X = 15

Sale 4:

Sold for 12 keys + 6.11 ref

Seller: https://backpack.tf/profiles/76561198054198170#!/compare/1532908800/1532995200

Buyer: https://backpack.tf/profiles/76561198305676157#!/compare/1532908800/1532995200

https://backpack.tf/item/6528224287

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

X = 12

Sale 5:

Sold to a bot for 12 keys + 6.11 ref

Seller: https://backpack.tf/profiles/76561198071807595#!/compare/1534204800/1534723200

Buyer: https://backpack.tf/profiles/76561198305676157#!/compare/1534636800/1534723200

https://backpack.tf/item/4918628895

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

X = 12

Sale 6:

Sold for cheap festivized items

Seller: https://backpack.tf/profiles/76561198327704668#!/compare/1533168000/1533254400

Buyer: https://backpack.tf/profiles/76561198070513361#!/compare/1533081600/1533168000

Too low, excluding.

Sale 7:

Sold for either a Cloud 9 Buckaroo’s Hat or a Screaming Tiger Rancho Relaxo

Seller: https://backpack.tf/profiles/76561198070513361#!/compare/1533168000/1533254400

Buyer: https://backpack.tf/profiles/76561198127030479#!/compare/1533254400/1533340800

Should fit in the range either way.

Untraceable bot.tf sales:

https://bot.tf/stats/item?def=1110&q=5&ef=Fountain+of+Delight&craft=1&aus=0&ks=0

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

https://backpack.tf/profiles/76561198335791307#!/compare/1533168000/1533254400

https://backpack.tf/item/3782640776 - labelled as a 12 key purchase, though it comes from a tradeit.gg bot, so it is untraceable.

Sellers:

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

15 keys:

https://backpack.tf/item/4918628895

30 keys:

https://backpack.tf/item/3782640776

Sales at:

12 (2x)

15

18

18 is gonna be too high, given the seller at 15, and the common B/O’s from bots over the last 2.5 months - https://i.imgur.com/VViQqxt.png

Going with 12-15.