https://marketplace.tf/items/tf2/324;5;u58

Oct 21 - $39.99 / $1.86 = 21.50 keys https://backpack.tf/item/4225372331

Oct 22 - $39.99 / $1.86 = 21.50 keys https://backpack.tf/item/7956746567

Dec 3 - $39.99 / $1.76 = 22.72 keys https://backpack.tf/item/7957220729

both of the oct 21/22 sales are mine, i bought both of them for $27.99 each on marketplace (now outdated though)

both of those $27.99 sales are about 15 keys though

https://backpack.tf/profiles/76561199093857425#!/compare/1602892800/1602979200

https://backpack.tf/profiles/76561199043177646#!/compare/1602892800/1602979200

Untraceable

https://backpack.tf/item/7957220729

this one was sold to erik then deposited to MP where it later sold for $40, but history doesn't show it

https://backpack.tf/profiles/76561198841279602#!/compare/1606348800/1606435200

https://backpack.tf/profiles/76561198064658655#!/compare/1606348800/1606435200

https://backpack.tf/profiles/76561199100906514#!/compare/1606435200/1606521600

https://gyazo.com/368c49817fcab4d5865a2378e9e64e3b

I bought it off a bot for ~16.4 soon after it was listed, then transferred to my bot

https://backpack.tf/profiles/76561199100906514#!/compare/1609113600/1609200000

https://backpack.tf/item/7957608009

https://gyazo.com/eade4e3fc7fab2f1f0f2c5e435240378

https://gyazo.com/d8ffadc70d3015e915ad3ae483028aba

My bot sold it for 22 keys

https://backpack.tf/profiles/76561198275446399#!/compare/1601424000/1601510400

https://backpack.tf/profiles/76561199085116273#!/compare/1601424000/1601510400

Untraceable

https://backpack.tf/profiles/76561199085116273#!/compare/1601510400/1601769600

https://backpack.tf/profiles/76561198064658655#!/compare/1601683200/1601856000

https://gyazo.com/c4d896bf14adaf7794df0d59785626d7

https://backpack.tf/item/7957171681

I bought this one for ~16.5 keys, transferred to MP, then later transferred to bot

https://backpack.tf/profiles/76561198038632729#!/compare/1605744000/1609200000

https://backpack.tf/profiles/76561198453203619#!/compare/1608249600/1608940800

Untraceable

lets see

15 / 15 / 22 / 22 in september/october

16.5 / 16.5 / (whatever erik bought it for) / 22 / 22 in november/december

lets go with 16-22

https://gyazo.com/86692d70184a35cbbd643e8cff005e66

https://backpack.tf/profiles/76561198188093413#!/compare/1610064000/1610150400

https://backpack.tf/profiles/76561198097427947#!/compare/1610064000/1610150400

https://backpack.tf/profiles/76561198064658655#!/compare/1610064000/1610150400

i bought 2 more for 19 keys each