Sale 1:

Sold for 12 keys + less than half a key in metal

https://backpack.tf/profiles/76561198062747535#!/compare/1747958400/1748044800

https://backpack.tf/profiles/76561198085880346#!/compare/1746748800/1748044800

https://backpack.tf/item/11120334996

= 12 keys

Sale 2:

Sold to a bot for 9 keys + negligible metal

https://backpack.tf/profiles/76561198354263779#!/compare/1755820800/1755907200

https://backpack.tf/profiles/76561199538198279#!/compare/1755820800/1755907200

https://backpack.tf/item/14313577937

= 9 keys

Other Sales:

#1

https://backpack.tf/profiles/76561198048571227#!/compare/1749168000/1751328000

https://backpack.tf/profiles/76561198850121720#!/compare/1749686400/1749772800

https://backpack.tf/item/12945561613

Untraceable

#2

https://backpack.tf/profiles/76561198273675032#!/compare/1748649600/1749254400

https://backpack.tf/profiles/76561198311498888#!/compare/1748736000/1748822400

https://backpack.tf/item/11360275537

Untraceable

#3

https://backpack.tf/profiles/76561198311498888#!/compare/1750982400/1751068800

https://backpack.tf/profiles/76561199523405376#!/compare/1751328000/1751414400

https://backpack.tf/item/11360275537

Untraceable

#4

https://backpack.tf/profiles/76561199523405376#!/compare/1751328000/1751414400

https://backpack.tf/profiles/76561199101376092#!/compare/1750550400/1751414400

https://backpack.tf/item/11360275537

Untraceable

Marketplace Sales:

https://marketplace.tf/items/tf2/31255;5;u223

https://backpack.tf/item/14313577937

$27.49, August 22nd

Item instantly re-sold to a bot for 9 keys, invalidating this sale. Excluding.

Sellers:

https://i.imgur.com/Rv1cIyr.png

https://backpack.tf/item/12945561613 - 12 keys

https://steamcommunity.com/market/listings/440/Unusual%20Mooshanka?filter=festive+lights

https://i.imgur.com/122P9UE.png - $44.33 AUD

https://steamcommunity.com/market/listings/440/Mann%20Co.%20Supply%20Crate%20Key

https://i.imgur.com/f0urcLM.png - keys currently ~$3.75 AUD

44.33/3.75 = 11.821

Sales at:

9

12

Buyers currently at ~9.7 keys, excluding 9.

Taking 12 flat.