Thanks to Strange for pointing out unsold:

There's a non KS seller at 70 keys, been there for 2 months https://backpack.tf/item/5461705786

I'd definitely exclude 77 here, also given it was Pro KS. I'd go 54-66 here, the fact you already excluded the 33 key sale would also help balance it out.

Just barely outdated, but looks like 70k, which supports a raise: https://backpack.tf/profiles/76561198342161127#!/compare/1622073600/1622160000

https://backpack.tf/item/7370001519

(Pro KS)

Untrace: https://backpack.tf/profiles/76561198101092523#!/compare/1626307200/1628380800

https://backpack.tf/item/7228958617

Strange distant dream blitzen bowl + sweets:

https://backpack.tf/profiles/76561198115721685#!/compare/1625788800/1625875200

using there (honestly, this sale looks bust now, but someone else can try to make it if they want)

Tradeback/lending idk: https://backpack.tf/item/4936909145

MP sale: https://marketplace.tf/items/tf2/56;14;kt-3

https://backpack.tf/item/2384011186

$139.99/1.81=77.3k

(Pro KS)

Also MP: https://marketplace.tf/items/tf2/56;14;kt-1

$119/1.81=65.7k

(Basic KS)

SCM (Pro KS):

https://steamcommunity.com/market/pricehistory/?country=US&currency=1&appid=440&market_hash_name=Collector%27s%20Professional%20Killstreak%20Huntsman

54k

57.2k

33.3k (below buyers)

Sales:

54, 57, 66, 77

One non pro KS sale at 66, but there are also lower pro KS sales. Excluding 77 under Strange's suggestion, so taking 54-66k as range.