Smoking Ze Goggles

New price: 9-11 keys

[proof below]

SALE #1 = invalid

https://marketplace.tf/items/177;5;u35

Sold for ~12 keys which is too high, going by current sellers. Supports 11 though.

SALE #2 = invalid

https://backpack.tf/profiles/76561198388098686#!/compare/1527724800/1527811200

https://backpack.tf/profiles/76561197977683190#!/compare/1527811200/1528070400

Untrace.

SALE #3 = 10 keys

https://backpack.tf/profiles/76561197977683190#!/compare/1512518400/1526947200

https://backpack.tf/profiles/76561198131057631#!/compare/1526169600/1526256000

https://backpack.tf/item/6764143357

Sold along roughly 1 key in sweets for a Spec KS Australium Black Box (~11) = 10 keys.

SALE #4 = invalid

https://backpack.tf/profiles/76561198154183700#!/compare/1526256000/1526342400

Bulk.

SALE #5 = 10 keys

https://backpack.tf/profiles/76561198154183700#!/compare/1524960000/1525046400

https://backpack.tf/profiles/76561198304138933#!/compare/1524873600/1524960000

https://gyazo.com/5b6c2bfab7ebfc2a98dcd032a25a3611

Sold for 10 keys.

SALE #6 = 11 keys

https://backpack.tf/profiles/76561198080310253#!/compare/1524614400/1524700800

https://backpack.tf/profiles/76561197969339106#!/compare/1524009600/1524700800

http://www.tf2outpost.com/trade/29631646 - B/O 11 keys

Sold for 35x Strange Carbonado Botkiller Scattergun Mk.1 (~8.77 ref)

8.77 x 35 = ~305 ref. Key price was roughly 27 ref back then.

315 / 27 = ~11 keys.

SALE #7 = invalid

https://backpack.tf/profiles/76561198163645769#!/compare/1525651200/1525737600

https://backpack.tf/profiles/76561198069326122#!/compare/1525651200/1525737600

Bulk.

SALE #8 = 10 keys

https://backpack.tf/profiles/76561198304138933#!/compare/1525564800/1525651200

https://backpack.tf/profiles/76561198163645769#!/compare/1525219200/1525651200

https://gyazo.com/5b6c2bfab7ebfc2a98dcd032a25a3611

Sold for 10 keys.

SALE #9 = invalid

https://backpack.tf/profiles/76561198151922248#!/compare/1524700800/1525219200

Better used there.

SALE #10 = 9 keys

https://backpack.tf/profiles/76561198316071886#!/compare/1530835200/1531180800

Sold for 9 keys. Credits to Mindacos.

SUMMARY

Sales: 9 / 10 / 10 / 10 / 11 keys

Sellers: 10 keys

https://gyazo.com/444a12d18d68c1416f7b338ddbd31437

Going with 9-11 keys.