https://marketplace.tf/items/tf2/30839;5;u3028

$49.99 / $1.99 = 25.12 keys

https://backpack.tf/profiles/76561198279054593#!/compare/1620864000/1620950400

https://backpack.tf/profiles/76561198850178158#!/compare/1620864000/1620950400

2 taunts

sold by qs store

so this thing probably was taken at buy orders

not using

https://backpack.tf/profiles/76561198850178158#!/compare/1622678400/1622764800

https://backpack.tf/profiles/76561198035132607#!/compare/1622678400/1622764800

looks like added 2.5 keys for open mind vampire, that was bought same day for 13 keys

vampire is 17 keys https://backpack.tf/suggestion/61009b037c1cc6582f473486

rounding to 15 keys

https://backpack.tf/profiles/76561198035132607#!/compare/1622764800/1622851200

https://backpack.tf/profiles/76561199127652476#!/compare/1622764800/1622851200

untraceable

https://backpack.tf/profiles/76561199127652476#!/compare/1622678400/1622764800

https://backpack.tf/profiles/76561198280524116#!/compare/1622678400/1622764800

16 keys

https://mannco.store/item/440-terrifying-thunder-unusual-taunt-didgeridrongo

https://backpack.tf/item/8156842316

slightly outdated but leaving here for supporting evidence

$29.95 / $1.88 = 15.93 keys

https://backpack.tf/profiles/76561198039834209#!/compare/1625702400/1625875200

https://backpack.tf/profiles/76561199106931116#!/compare/1625875200/1625961600

bulk

https://backpack.tf/profiles/76561198167684674#!/compare/1620950400/1621209600

https://backpack.tf/profiles/76561198418746809#!/compare/1620259200/1622851200

untraceable

sales

15

16

25

seller at $41 on MP for 1 month https://backpack.tf/item/8207087898

25 is high