Sale 1:

https://backpack.tf/profiles/76561198162830293#!/compare/1581465600/1587340800

https://backpack.tf/profiles/76561198363395191#!/compare/1583020800/1583107200

untrace

Sale 2:

https://backpack.tf/profiles/76561198155073647#!/compare/1583712000/1585440000

https://backpack.tf/profiles/76561198252999692#!/compare/1585094400/1585180800

Sold for 9 keys

sale 3:

https://backpack.tf/profiles/76561198252999692#!/compare/1585094400/1585180800

https://backpack.tf/profiles/76561198133864129#!/compare/1582675200/1585180800

Sold for ~9.5 keys

Sale 4:

https://backpack.tf/profiles/76561198133864129#!/compare/1585267200/1585353600

https://backpack.tf/profiles/76561198111260442#!/compare/1585180800/1585353600

Untrace

sale 5:

https://backpack.tf/profiles/76561198111260442#!/compare/1585612800/1585699200

https://backpack.tf/profiles/76561198253177889#!/compare/1585008000/1585699200

Sold for Miasma Zapteador

use there, few sales

https://bot.tf/stats/listings/M199Q0N1

B/O of 17 keys

sale 6:

https://backpack.tf/profiles/76561198117445150#!/compare/1584576000/1584662400

https://backpack.tf/profiles/76561198322380737#!/compare/1584576000/1584662400

Sold for Spell + sweets

sale 7:

https://backpack.tf/profiles/76561198322380737#!/compare/1584662400/1584921600

https://backpack.tf/profiles/76561198418740133#!/compare/1584835200/1584921600

Sold with ~1 key in sweets for TW Warm Up

use there

sale 8:

https://marketplace.tf/items/tf2/445;5;u57

$21.95 / $1.78 = 12.33 keys <--- https://backpack.tf/item/2286040117

$21.95 / $1.68 = 13.07 keys <--- https://backpack.tf/item/4545254889

$21.95 / $1.69 = 12.99 keys <--- https://backpack.tf/item/2286040117

$20 / $1.79 = 11.17 keys

Total sales @:

9, 9.5, 11, 12, 13, 13 keys

buyers up to ~9 keys,

near month old seller at 17 keys,

calling 9 low,

taking 10 - 13 keys.