I just had to make sure

Sale 1

http://www.tf2outpost.com/trade/29382220 Sold for Stormy Connoisseur's

B/O for Conq was 10.5

Cap had no trade

X = 12.5

X = 13

X = 10.5 (B/O), rounding up to 11

Cap https://backpack.tf/item/621018476

Conquistador https://backpack.tf/item/3350340367

Trade https://backpack.tf/profiles/76561198084668327#!/compare/1506816000/1507334400

Mini for Cap

https://backpack.tf/suggestion/59ec4d30cf6c753f6624cd32 12.5 keys, using 12.5

Sale 2

http://www.tf2outpost.com/trade/29373758 Sold for 10 keys

X = 10

Conq https://backpack.tf/item/3350340367

Trade https://backpack.tf/profiles/76561198048008254#!/compare/1506384000/1506470400

Sale 3

https://backpack.tf/profiles/76561198082987633#!/compare/1505001600/1505088000 Something involving a key

Sale 4

[No OP Trade] Sold for 14.1 keys in sweets

X = 14

Trade https://backpack.tf/profiles/76561198216561389#!/compare/1504396800/1504483200

Conq https://backpack.tf/item/3350340367

Sale 5

https://backpack.tf/profiles/76561198281580442#!/compare/1507507200/1507939200 Sold for indeterminate amount keys, possibly used to buy SMG

Sale 6

http://www.tf2outpost.com/trade/29344918 Sold for 10 keys

X = 10

Trade https://backpack.tf/profiles/76561198072722879#!/compare/1503273600/1504310400

Conq https://backpack.tf/item/4606021664

Sale 7

https://backpack.tf/profiles/76561198149459336#!/compare/1503705600/1503792000 Blizz Liquidator's, but sales conflict with buyers heavily, not touching

Classifieds

https://gyazo.com/321d893b04261d01265332ed775bc24d 2x 11k, 1x 13k

Judging by the sellers above there is no way 14 can be included in the range