Technically in-date, but needs an update.

Sale 1:

Sold to a bot for 45 keys

https://backpack.tf/profiles/76561198182769463#!/compare/1780704000/1781481600

https://backpack.tf/profiles/76561199072652703#!/compare/1781395200/1781481600

https://backpack.tf/item/16494235745

= 45 keys

Sale 2:

Sold to STN for 40 keys + negligible metal

https://backpack.tf/profiles/76561198038840155#!/compare/1782172800/1782259200 - Near ID: 17184958584

https://backpack.tf/profiles/76561199026390261#!/compare/1782172800/1782259200

https://backpack.tf/item/16632622122

= 40 keys

Other Sales:

#1

https://backpack.tf/profiles/76561198252901758#!/compare/1780012800/1780099200

https://backpack.tf/profiles/76561198038840155#!/compare/1779926400/1780099200

https://backpack.tf/item/16632622122

Untraceable, unusualified by the seller

#2

https://backpack.tf/profiles/76561198342027630#!/compare/1782518400/1782604800

https://backpack.tf/profiles/76561198310750043#!/compare/1782518400/1782604800

https://backpack.tf/item/16494235742

Untraceable

#3

https://backpack.tf/profiles/76561199846648987#!/compare/1781136000/1783555200

https://backpack.tf/profiles/76561198182769463#!/compare/1780704000/1781481600

https://backpack.tf/item/16494235745

Backpack buy or something. Untraceable. Unusualified by the seller.

https://backpack.tf/item/16856954960 - unusualified

https://backpack.tf/item/16505665486 - marketplace, likely unusualified by the seller

Sellers:

https://i.imgur.com/wAg9RxG.png

https://backpack.tf/item/16494235745 - 55 keys

https://backpack.tf/item/16856954960 - 75 keys

https://marketplace.tf/items/tf2/31578;5;u3003

https://backpack.tf/item/16505665486 - $119.99

https://backpack.tf/item/16487219144 - $149.99

https://stntrading.eu/item/tf2/Unusual+Holy+Grail+Taunt%3A+Chairholder

https://i.imgur.com/CLowFg8.png

https://backpack.tf/item/16632622122 - ~47.6 keys

Sales at:

40

45

Both sales are bot dumps, but with the buyers dropping to ~28 keys, sellers not far off, and a lack of any other sales, these should be fine to use.

Taking 40-45 keys.