Item 1:

https://backpack.tf/item/1988823489

Sale 1:

https://backpack.tf/profiles/76561198838788284#!/compare/1763164800/1763510400

https://backpack.tf/profiles/76561199634145883#!/compare/1763337600/1763596800

Sold for 275 keys pure

Item 2:

https://backpack.tf/item/13081956485

Sale 2:

https://backpack.tf/profiles/76561198799842401#!/compare/1764028800/1766880000

https://backpack.tf/profiles/76561199485225128#!/compare/1765065600/1765324800

Untrace

Sale 3:

https://backpack.tf/profiles/76561199485225128#!/compare/1765324800/1765411200

https://backpack.tf/profiles/76561199098366624#!/compare/1765324800/1765411200

Untrace, looks like bulk

Sale 4:

https://backpack.tf/profiles/76561199098366624#!/compare/1765324800/1765411200

https://backpack.tf/profiles/76561198063640894#!/compare/1765324800/1765411200

Untrace, looks like bulk. (Maybe sold with Shrieking Shades A Well Wrapped Hat for a Cosmic Constellations Antarctic Eyewear + The Dark Doorway Archer's Sterling, though compares are super messy and a lot of items were traded same day between)

//

Sellers:

BPTF - https://imgur.com/a/wtPINj1 - 1 @ 600

MPTF - https://marketplace.tf/items/tf2/721;5;u71 - None

STN - https://stntrading.eu/item/tf2/Unusual+Green+Black+Hole+Conquistador - None

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Conquistador?filter=Green+Black+Hole - None

Sale(s):

275

Going with 275 keys flat

Even though the sale is 6 days out of date I still think it should be accepted due to it being the only traceable non bulk sale plus the last suggestion was two years ago :)