Sale 1:

Sold with a bit more than a key in items/metal (seller’s end) for Bubbling Defiant Spartan (11.5)

Seller: https://backpack.tf/profiles/76561198321391853#!/compare/1552867200/1552953600

Buyer: https://backpack.tf/profiles/76561198886994914#!/compare/1552867200/1552953600

https://backpack.tf/item/2344646529

https://bot.tf/stats/listings/Y8V95KWY - B/O of 11

X = 10

Sale 2:

Sold for 10 keys + 7 ref

Seller: https://backpack.tf/profiles/76561198315588518#!/compare/1552608000/1552694400

Buyer: https://backpack.tf/profiles/76561198219252313#!/compare/1552608000/1552694400

https://backpack.tf/item/2344646529

https://i.imgur.com/1NwrNs9.png - bot.tf confirms

X = 10

Sale 3:

Sold for Bubbling Janissary Ketche + ~2 keys in items (buyer’s end)

Seller: https://backpack.tf/profiles/76561198002757046#!/compare/1553558400/1553644800

Buyer: https://backpack.tf/profiles/76561198212497608#!/compare/1553472000/1553644800

https://backpack.tf/item/2662458150

https://bot.tf/stats/listings/MQXD6NQ4 - B/O of ~9.5

Easily caps.

X = 9.5 (Capped by B/O)

Sale 4:

Sold for 9 keys + less than 1/4th of a key in metal/weapons

Seller: https://backpack.tf/profiles/76561198212497608#!/compare/1553817600/1553990400

Buyer: https://backpack.tf/profiles/76561198351015534#!/compare/1553904000/1553990400

https://backpack.tf/item/2662458150

X = 9

Sale 5:

Sold to a bot for 9 keys + 7 ref

Seller: https://backpack.tf/profiles/76561198053717045#!/compare/1552435200/1552521600

Buyer: https://backpack.tf/profiles/76561198315588518#!/compare/1552435200/1552521600

https://i.imgur.com/1NwrNs9.png - bot.tf confirms

X = 9

Sale 6:

Sold to a quickbuyer for 9 keys + 10 ref

Seller: https://backpack.tf/profiles/76561198886994914#!/compare/1552953600/1553040000

Buyer: https://backpack.tf/profiles/76561198024867201#!/compare/1552953600/1553040000

https://backpack.tf/item/2344646529

X = 9

Other Sales:

https://backpack.tf/item/2662458150 (#1-5)

https://backpack.tf/item/2344646529 (#6-11)

#1

Untraceable/bulk/gambled

https://backpack.tf/profiles/76561198348738792#!/compare/1550361600/1550448000

https://backpack.tf/profiles/76561198402495238#!/compare/1550361600/1550448000

#2

Bulk

https://backpack.tf/profiles/76561198402495238#!/compare/1550448000/1550534400

https://backpack.tf/profiles/76561198089253101#!/compare/1550448000/1550534400

#3

Sold for Mannrobics Unusualifier

https://backpack.tf/profiles/76561198089253101#!/compare/1551398400/1551484800

https://backpack.tf/profiles/76561198256438505#!/compare/1551398400/1551484800

Can be used on the Mannrobics.

#4

Untraceable

https://backpack.tf/profiles/76561198256438505#!/compare/1551398400/1551484800

https://backpack.tf/profiles/76561198002757046#!/compare/1551398400/1551484800

#5

Sold for 8 keys?

https://backpack.tf/profiles/76561198351015534#!/compare/1553904000/1553990400

https://backpack.tf/profiles/76561198258257749#!/compare/1553817600/1553990400

Tried looking through the keys that came from the ambassador on the ambassador buyer’s end to see if they were involved, but I couldn’t find any that matched.

#6

Untraceable

https://backpack.tf/profiles/76561198274887543#!/compare/1550880000/1552089600

https://backpack.tf/profiles/76561198007696852#!/compare/1550793600/1550880000

#7

Untraceable

https://backpack.tf/profiles/76561198007696852#!/compare/1550793600/1550880000

https://backpack.tf/profiles/76561198083765817#!/compare/1550707200/1550880000

#8

Sold with spelled item for Nuts Practitioner

https://backpack.tf/profiles/76561198083765817#!/compare/1550707200/1550880000

https://backpack.tf/profiles/76561198269636307#!/compare/1550707200/1550880000

Using on the Practitioner.

#9

Bulk for Stormy Coldsnap

https://backpack.tf/profiles/76561198269636307#!/compare/1550966400/1551052800

https://backpack.tf/profiles/76561198053717045#!/compare/1550966400/1551052800

#10

Sold with 2 keys + some metal for Cloud 9 Fat Man’s Field Cap

https://backpack.tf/profiles/76561198219252313#!/compare/1552694400/1552780800

https://backpack.tf/profiles/76561198046102461#!/compare/1552435200/1552780800

#11

Untraceable

https://backpack.tf/profiles/76561198046102461#!/compare/1552780800/1552867200

https://backpack.tf/profiles/76561198321391853#!/compare/1552780800/1552867200

most likely bought for 9, which fits in the range.

Sellers:

https://i.imgur.com/BEZ7UmV.png

https://backpack.tf/item/2344646529 - 11 keys

https://backpack.tf/item/7438810130 - 12 keys

https://backpack.tf/item/1818401763 - 12 keys

Sales at:

9 (3x)

9.5

10 (2x)

9 may have gone to quickbuyers a couple times, but there are too many sales at 9 to be excluded. On top of that, there currently aren't any (visible) buy orders higher than ~8.2 keys. Keeping 9.

Going with 9-10.