Resuggesting with Blaze.xTH3RM4Lx's advice.

Apologies for lack of response on prev suggestion, distancing myself from TF2 nowadays.

35k sale

Sold on May 27-28 for 35k pure

https://backpack.tf/profiles/76561198280667527#!/compare/1590537600/1590624000

(The Fedora was traded fo the Rubber Glove & we can ignore the small ref amounts, which leaves us with the 35 keys)

Item history: https://backpack.tf/item/7957660582

37k sale and 45k sale

Sold on May 4 for $70 and on Jun 28 for $92

https://marketplace.tf/items/tf2/30326;5;u14

70/1.88 = ~37k

92/2.05 = ~45k

Untraceable

https://backpack.tf/profiles/76561198280667527#!/compare/1590624000/1590710400

Item history on the keys gives no indication of how it was traded

Only recent sales I could find.

Last traceable sale in March 2020: https://backpack.tf/item/7096291319

Last traceable sale in 2017: https://backpack.tf/item/6164240720

2 buyers at ~36k: https://i.imgur.com/rdpTZdB.png (now gone — screencap was taken 23rd June)

Summary

Sales at 35k, 37k, 45k

Buyers at 36k are gone

Given the lower sellers, ignoring the 45k sale and pricing at 35-37k.