Massed Flies Tavish DeGroot Experience

New price: 11 keys

[proof below]

SALE #1 = 11 keys

https://backpack.tf/profiles/76561198119563409#!/compare/1518739200/1518825600

Sold for 10 keys + 20 ref, rounding to 11 keys. Credits to Ilya.

SALE #2 = invalid

https://backpack.tf/profiles/76561198045528305#!/compare/1518825600/1518912000

https://backpack.tf/profiles/76561198040898430#!/compare/1518825600/1518912000

Bought for buy order at 9 keys. Credits to K1ng.

https://scrap.tf/unusuals/89

https://backpack.tf/item/1318568561

Scrap.tf selling at 12 keys for over 2 months supports this drop.

SUMMARY

Sales: 11 keys

Sellers: 11 / 15 keys

https://gyazo.com/774d8fb5a0d592ff19b27888417b7b33

Counter. Other suggester had 23 days since I left a comment. Going with 11 keys.