Re-suggesting, new sale.

Sale 1:

Sold for 230 keys

https://backpack.tf/profiles/76561198021055079#!/compare/1757116800/1757203200

https://backpack.tf/profiles/76561198035132368#!/compare/NaN/1757116800 - not updated yet

https://backpack.tf/item/6917277619

https://i.imgur.com/jF3Ogg8.png

= 230 keys

Sale 2:

Sold for 228 keys

https://backpack.tf/profiles/76561198061440669#!/compare/1756512000/1756598400

https://backpack.tf/profiles/76561198050401939#!/compare/1756339200/1756598400

https://backpack.tf/item/9286444511

= 228 keys

Sale 3:

Sold for 172 keys + Double-spelled Strange Mishap Mercenary (Re-sold for 45)

https://backpack.tf/profiles/76561199112608744#!/compare/1753833600/1753920000

https://backpack.tf/profiles/76561198088063575#!/compare/1753833600/1753920000

https://backpack.tf/item/13727608924

Pretty clear that the spelled item went to a spell buyer shortly after, the keys match with a spell-buying account, and we can see their marketplace listing:

https://backpack.tf/item/3013275606

https://i.imgur.com/6IXZwto.png

= 217 keys

Sale 4:

Most likely sold for 187 keys (Buyer’s end)

https://backpack.tf/profiles/76561199085308746#!/compare/1751414400/1751500800

https://backpack.tf/profiles/76561198320266874#!/compare/1751414400/1751500800

https://backpack.tf/item/6917277619

= 187 keys

Sale 5:

Sold for 180 keys

https://backpack.tf/profiles/76561198309705759#!/compare/1751673600/1753142400

https://backpack.tf/profiles/76561198072286167#!/compare/1752883200/1753142400

https://backpack.tf/item/10726935030

= 180 keys

Marketplace Sales:

https://marketplace.tf/items/tf2/30976;5;u13

$404.99, June 10th. Couldn’t find the history.

https://marketplace.tf/items/tf2/5021;6 - keys were $1.95

404.99/1.95 = 207.687, rounds to 208 keys

Other Sales:

#1

https://backpack.tf/profiles/76561198059068755#!/compare/1753920000/1754524800

https://backpack.tf/profiles/76561198057412106#!/compare/1753833600/1753920000

https://backpack.tf/item/10405813455

Backpack buy

#2

https://backpack.tf/profiles/76561198306902768#!/compare/1753315200/1753401600

https://backpack.tf/profiles/76561198040965652#!/compare/1753315200/1753401600

https://backpack.tf/item/7501241902

Backpack buy

#3

https://backpack.tf/profiles/76561199080553543#!/compare/1747094400/1752451200

https://backpack.tf/profiles/76561199112608744#!/compare/1752364800/1752451200

https://backpack.tf/item/7156895231

Untraceable

#4

https://backpack.tf/profiles/76561198074308509#!/compare/1753315200/1753228800

https://backpack.tf/profiles/76561198021055079#!/compare/1753228800/1753315200

https://backpack.tf/item/6917277619

Bulk for Nebula Universal Translator, using there

#5

https://backpack.tf/profiles/76561198320266874#!/compare/1753056000/1753228800

https://backpack.tf/profiles/76561198074308509#!/compare/1752883200/1753228800

https://backpack.tf/item/6917277619

Untraceable

https://backpack.tf/item/12918136783 - mannco

Sellers:

https://i.imgur.com/wJXNNJ2.png

https://backpack.tf/item/6917277619 - 230 keys

https://backpack.tf/item/9286444511 - 245 keys

https://backpack.tf/item/7024381760 - 250 keys

Buyers at ~200 keys

https://marketplace.tf/items/tf2/30976;5;u13

https://backpack.tf/item/7156895231 - $414 (~230 keys)

https://backpack.tf/item/7501241902 - $414

https://backpack.tf/item/10405813455 - $436.99

Sales at:

180

187

208 (marketplace)

217

228

230

Buyers up to 200 keys, excluding 180 and 187.

Rounding 208 to 210, as it is NOT a pure sale.

Taking 210-230 keys.