Sale 1:

Sold for Purple Confetti Hong Kong Cone (Suggestion at 40 below)

Seller: https://backpack.tf/profiles/76561198137642054#!/compare/1545955200/1546128000

Buyer: https://backpack.tf/profiles/76561197982879578#!/compare/1546128000/1546214400

https://backpack.tf/item/2126513465

X = 40

Sales 2 & 3:

Sold for $65.99 & $45.05 on marketplace

https://marketplace.tf/items/30003;5;u6

https://manic.tf/keyprice/?at=2018-12-08 - $65.99 / $1.69 = 39.05 keys

$45.05 went to a marketplace buy order. Excluding.

X = 39

Sale 4:

Sold for Steaming Merc’s Mohawk (34.5)

Seller: https://backpack.tf/profiles/76561198355667850#!/compare/1542672000/1542758400

Buyer: https://backpack.tf/profiles/76561198316101664#!/compare/1542672000/1542758400

https://backpack.tf/item/2126513465

X = 35

Sale 5:

Sold for Duped Flaming Lantern Bubble Pipe (Mini at 33 below) + 1 key and some metal

Seller: https://backpack.tf/profiles/76561198095231098#!/compare/1546646400/1547251200

Buyer: https://backpack.tf/profiles/76561198217649723#!/compare/1547164800/1547251200

https://backpack.tf/item/2126513465

X = 34

Sale 6:

Sold to a quickbuyer for 28 keys

Seller: https://backpack.tf/profiles/76561198144346135#!/compare/1543708800/1543795200

Buyer: https://backpack.tf/profiles/76561198002757046#!/compare/1543708800/1543795200

https://backpack.tf/item/2126513465

X = 28

Originally planned on using on the HKC, but given the other sales on this thing, this would end up lower than the quickbuyers on that thing.

Sale 7:

Untraceable

Seller: https://backpack.tf/profiles/76561197994587943#!/compare/1542585600/1542758400

Buyer: https://backpack.tf/profiles/76561198355667850#!/compare/1542672000/1542758400

https://backpack.tf/item/2126513465

Sale 8:

Bulk for Uncraftable Max’s

Seller: https://backpack.tf/profiles/76561198316101664#!/compare/1543622400/1543708800

Buyer: https://backpack.tf/profiles/76561198144346135#!/compare/1543622400/1543708800

https://backpack.tf/item/2126513465

Sale 9:

Untraceable

Seller: https://backpack.tf/profiles/76561198002757046#!/compare/1545091200/1545177600

Buyer: https://backpack.tf/profiles/76561198137642054#!/compare/1545177600/1545264000

https://backpack.tf/item/2126513465

Sale 10:

Untraceable

Seller: https://backpack.tf/profiles/76561197982879578#!/compare/1546214400/1546300800

Buyer: https://backpack.tf/profiles/76561198095231098#!/compare/1546300800/1546387200

https://backpack.tf/item/2126513465

Duped Lantern Bubble Pipe Mini:

Sold for 33 keys

Seller: https://backpack.tf/profiles/76561198085931736#!/compare/1548288000/1548374400

Buyer: https://backpack.tf/profiles/76561198048589995#!/compare/1548288000/1548374400

X = 33

Purple Confetti Hong Kong Cone:

https://backpack.tf/suggestion/5c597ce9cf6c757ad11bd0fa

Sellers:

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

https://backpack.tf/item/2126513465 - 47 keys

https://backpack.tf/item/5037173932 - 50 keys

https://backpack.tf/item/5680386226 - 50 keys

Sales at:

28

34

35

39

40

28 went to a quickbuyer, and there are currently buyers for higher. Excluding 28.

Going with 34-40.