2 recent sales.

1) https://backpack.tf/item/8679041633

Sold for $89.99 on marketplace - https://marketplace.tf/items/tf2/31090;5;u145;strange

Keys were $1.88 at the time (I checked this through marketplace but don't know how to link proof, so if somebody could do that for me I'd really appreciate it)

Comes out to 47.8 keys, rounding to 48

2) https://backpack.tf/profiles/76561198021055079#!/compare/1595548800/1595635200

https://backpack.tf/profiles/76561198069980430#!/compare/1594684800/1595808000

Sold for 50 pure

My compare doesn't show the keys leaving my backpack due to the inventory loading issue keeping my backpack stuck on July 14th.