https://backpack.tf/item/6818596145 - Contains all sales used here.

Sale 1:

Sold with 11 keys + Buds (~2) for Burning Flames Rack (345)

Seller: https://backpack.tf/profiles/76561198091539797#!/compare/1533427200/1533513600

Buyer: https://backpack.tf/profiles/76561198079294342#!/compare/1533427200/1533513600

https://backpack.tf/item/6818596145

X = 330 (Rounded from 332)

Sale 2:

Sold for ~200 keys?

Seller: https://backpack.tf/profiles/76561198103922319#!/compare/1533513600/1536883200

Buyer: https://backpack.tf/profiles/76561198091539797#!/compare/1533427200/1533513600

https://backpack.tf/item/6818596145

Can’t confirm, not using.

Sale 3:

Bulk for Beams HKC

Seller: https://backpack.tf/profiles/76561198079294342#!/compare/1534809600/1535068800

Buyer: https://backpack.tf/profiles/76561198068404730#!/compare/1534982400/1535068800

Would be better to use on the HKC, but would support the drop if used here.

Sellers:

https://i.imgur.com/AO0juzR.png

https://backpack.tf/item/4646698052 - 599 keys

https://backpack.tf/item/6818596145 - 600 keys

And another on marketplace.tf for ~$600 (roughly 320 keys

https://marketplace.tf/items/30748;5;u14

https://backpack.tf/item/4850424149

Sales at:

330

Marketplace.tf seller at 320.

Going with 320-330.

Update:

No new sales.

Seller at 600 lowered to 550 - https://i.imgur.com/N1OQum4.png

Marketplace seller is still there.