Sale 1:

Sold for 24 keys

Seller: https://backpack.tf/profiles/76561198002757046#!/compare/1539561600/1539648000

Buyer: https://backpack.tf/profiles/76561198189798126#!/compare/1539561600/1539648000

https://backpack.tf/item/4573469275

X = 24

Sale 2:

Quicksold for 20 keys + some metal

Seller: https://backpack.tf/profiles/76561198070705963#!/compare/1538265600/1538352000

Buyer: https://backpack.tf/profiles/76561198266876790#!/compare/1538265600/1538352000

https://backpack.tf/item/4573469275

X = 20

Sale 3:

Sold with war paint for Purple Confetti Connoisseur’s Cap + metal

Seller: https://backpack.tf/profiles/76561198189798126#!/compare/1541376000/1541548800

Buyer: https://backpack.tf/profiles/76561198316071886#!/compare/1541376000/1541462400

https://backpack.tf/item/4573469275

Using on the Cap.

Sale 4:

Bulk for DBD Noble

Seller: https://backpack.tf/profiles/76561198148608504#!/compare/1538265600/1538352000

Buyer: https://backpack.tf/profiles/76561198070705963#!/compare/1538265600/1538352000

https://backpack.tf/item/4573469275

Sale 5:

Untraceable

Seller: https://backpack.tf/profiles/76561198266876790#!/compare/1538352000/1538438400

Buyer: https://backpack.tf/profiles/76561198002757046#!/compare/1538352000/1538438400

https://backpack.tf/item/4573469275

Most likely missing a name in the history.

Sale 6:

Untraceable

Seller: https://backpack.tf/profiles/76561198145599922#!/compare/1538352000/1543449600

Buyer: https://backpack.tf/profiles/76561198145072434#!/compare/1543363200/1543449600

https://backpack.tf/item/6713102343

probably traded between friends or something

https://backpack.tf/item/4491866002 - nothing usable here

Sales at:

20

24

No current sellers (as least with my method of checking sellers)

20 quicksold, excluding 20.

Going with 24 flat.