Counter. Using sales from the last suggestion onwards.

Previous in-date sale: 450 keys

https://backpack.tf/profiles/76561198261483133#!/compare/1707955200/1708041600

proof: https://imgur.com/a/wfxR0LZ

https://backpack.tf/profiles/76561198161711912#!/compare/1708905600/1708992000

Bulk for Burning Villain's Veil

https://backpack.tf/profiles/76561198042509221#!/compare/1703635200/1705708800

Bulk for keys

Credit to taser for the next 3 sales:

https://backpack.tf/profiles/76561198080735902#!/compare/1712534400/1712707200

Cloudy Moon Swagman's Swatter + Pumpkin Moon Spooky Head-Bouncers (in-date at 71 at the time) + 14 keys for a Disco Beat Down Master's Yellow Belt (in-date at 475 at the time)

475 - 71 - 14 = 390

However, the user is a banned scammer

https://backpack.tf/profiles/76561198124904264#!/compare/1713484800/1713657600

Bulk for a Spelled Cloudy Moon Sergeant's Drill Hat

https://backpack.tf/profiles/76561198094964657#!/compare/1713657600/1713830400

550 keys for the swagman + steaming pyromancer's mask (Suggestion at 240)

= 310

https://backpack.tf/profiles/76561198415564349#!/compare/1723248000/1723334400

https://backpack.tf/profiles/76561198415564349#!/compare/1723248000/1723334400

https://backpack.tf/item/544023198

410 keys

https://marketplace.tf/items/tf2/626;5;u38

https://backpack.tf/item/546613554

https://imgur.com/a/qIWmaCR - No clear B/O

$649.99, July 27th

https://marketplace.tf/items/tf2/5021;6 - keys were $1.74

649.99/1.74 = ~370 (after rounding)

Steaming Mask:

https://backpack.tf/suggestion/66b956ebca4a355ce202007d

https://imgur.com/a/jXNGaGt - no current sellers, buyers at 310

Sales at:

310

370

390 (invalid)

410

450

310 is an outlier, and countered by buyers. Excluding 310.

Taking 370-450.