Sale 1:

Sold for 24 keys

https://backpack.tf/profiles/76561199564942025#!/compare/1738108800/1738195200 - Near ID: 15405451060

https://backpack.tf/profiles/76561198251704884#!/compare/1738108800/1738195200

https://backpack.tf/item/4369110004

= 24 keys

Sale 2:

Sold for 19 keys?

https://backpack.tf/profiles/76561198830130042#!/compare/1730851200/1734220800

https://backpack.tf/profiles/76561199500810413#!/compare/1734134400/1734220800

https://backpack.tf/item/4272439786

18 keys match on the seller’s end, but they pretty clearly got more out of it, considering the extra stuff they got afterwards.

https://i.imgur.com/Iqjjwpc.png - snapshot suggests it was 19 keys (1214.97/63.95555 = ~19)

Checking the buyer’s end, the first 19 keys seem to match, with one exception, which is most likely our missing key:

https://backpack.tf/item/13718632868

Taking this as 19.

= 19 keys

Other Sales:

#1

https://backpack.tf/profiles/76561198401158635#!/compare/1733529600/1733616000

https://backpack.tf/profiles/76561198219027272#!/compare/1733529600/1733616000

https://backpack.tf/item/7430444404

Untraceable

#2

https://backpack.tf/profiles/76561198385727483#!/compare/1736640000/1736726400

https://backpack.tf/profiles/76561199564942025#!/compare/1736640000/1736726400

https://backpack.tf/item/4369110004

Bulk to STN

Sellers:

https://i.imgur.com/IxyK5XC.png

https://backpack.tf/item/4445179078 - 20 keys

https://backpack.tf/item/4255341149 - 50 keys

https://backpack.tf/item/4616243941 - marketplace

Sales at:

19

24

Seller at 20 hasn’t been bumped since creation, and appears young. Briefly looking at the snapshots, I found another instance of them listing the item for 25 keys about 2 weeks ago.

https://i.imgur.com/SNUS2do.png

Gonna give that the seller the benefit of the doubt.

Taking 19-24 keys.