Thanks to Blaze:

https://backpack.tf/profiles/76561198429062799#!/compare/1632441600/1632528000

https://backpack.tf/profiles/76561198119937114#!/compare/1632441600/1632528000 - sold for 17 keys

since the buyer at 20 ending up re-selling for 17 keys, it would be better to go 13 - 17 here

Untrace, but snapshot suggests ~11k: https://gladiator.tf/listings/60e00201ccbac9798d51c540

https://backpack.tf/profiles/76561198039117789#!/compare/1622073600/1625356800

https://backpack.tf/profiles/76561198453530349#!/compare/1625184000/1625270400

This is nevertheless under buyers, excluding.

Strictly speaking untrace, but a few 13k sales on Scrapyard's compare seem to match up with listing snapshot: https://gladiator.tf/listings/60e119b34d6643aea10f1281

https://backpack.tf/profiles/76561198453530349#!/compare/1625270400/1625356800

https://backpack.tf/profiles/76561198432714467#!/compare/1625270400/1625443200

Given it's a bot with no owner listed, negotiation would seem unlikely. Taking 13k for this sale.

20 keys: https://gladiator.tf/listings/60ed6a2a1a54efb9a6dffbce

https://backpack.tf/profiles/76561198432714467#!/compare/1626134400/1626220800

https://backpack.tf/profiles/76561198429062799#!/compare/1626134400/1626220800