Resuggestion, thanks to Mindacos for the info!

Sale 1:

https://backpack.tf/profiles/76561199017904814#!/compare/1581897600/1583539200

https://backpack.tf/profiles/76561199022754136#!/compare/1581811200/1581897600

https://backpack.tf/profiles/76561198132111326#!/compare/1581811200/1581897600

https://backpack.tf/profiles/76561198074718149#!/compare/1581811200/1581897600

https://backpack.tf/profiles/76561198020673987#!/compare/1583107200/1583280000

Untrace

sale 2:

https://backpack.tf/profiles/76561198020673987#!/compare/1583280000/1583884800

https://backpack.tf/profiles/76561198850274253#!/compare/1583280000/1583884800

QS

Sale 3:

https://backpack.tf/profiles/76561198928421771#!/compare/1582070400/1582156800

https://backpack.tf/profiles/76561198088812563#!/compare/1582070400/1582156800

Sold for 16 keys

sale 4:

https://backpack.tf/profiles/76561198088812563#!/compare/1584662400/1585008000

https://backpack.tf/profiles/76561198110526996#!/compare/1584748800/1584835200

Untrace

sale 5:

https://backpack.tf/profiles/76561198110526996#!/compare/1584835200/1584921600

https://backpack.tf/profiles/76561198182415563#!/compare/1584835200/1584921600

Sold with 4 keys for DBD Hottie

hottie mini:

https://backpack.tf/suggestion/5ea1eed3de1f5722bb4bd5be

Suggestion for 14 keys

Total is 10 keys

sale 6:

https://backpack.tf/profiles/76561198182415563#!/compare/1584921600/1585008000

https://backpack.tf/profiles/76561198151118618#!/compare/1584662400/1585008000

Can trace sweets

Total sales @:

10, 16 keys

https://bot.tf/stats/listings/MQ08D262

Unsold at 12 keys for nearly a month

Mindaocs' Part:

I'd take johan's listings with a grain of salt, since they require you to use an external site to purchase the item. It wouldn't surprise me if that's the reason why his listings are up for as long as they are.

With that in mind, plus the fact that it's gone(and likely, untraceable), I see no reason to exclude 16. 10-16 should be fine.