Resuggestion, thanks to polar for the info!

Sale 1:

https://backpack.tf/profiles/76561198036281079#!/compare/1543881600/1545523200

https://backpack.tf/profiles/76561197964171516#!/compare/1544227200/1544313600

Bulky

Sale 2:

https://backpack.tf/profiles/76561198055983562#!/compare/1538352000/1540684800

https://backpack.tf/profiles/76561198407541175#!/compare/1540339200/1540425600

Untrace

Sale 3:

https://backpack.tf/profiles/76561198407541175#!/compare/1540425600/1540512000

https://backpack.tf/profiles/76561198083047491#!/compare/1540339200/1540512000

Sold for ~16 keys

Sale 4:

https://backpack.tf/profiles/76561198083047491#!/compare/1540857600/1540944000

https://backpack.tf/profiles/76561198294402054#!/compare/1540857600/1540944000

Sold for 18 keys + ~1 key in ref

Sale 5:

https://backpack.tf/profiles/76561198294402054#!/compare/1540944000/1541030400

https://backpack.tf/profiles/76561197998934095#!/compare/1540771200/1541116800

Sold with ~0.5 keys in sweets for Miami Scrap(22.5)

Total is 22 keys

Sale 6:

https://backpack.tf/profiles/76561197998934095#!/compare/1541203200/1541462400

https://backpack.tf/profiles/76561198160393187#!/compare/1541376000/1541808000

Sold for 20 keys

Sale 7:

https://backpack.tf/profiles/76561198112281935#!/compare/1543190400/1543276800

https://backpack.tf/profiles/76561198061489334#!/compare/1543190400/1543276800

Sold for 15 keys

Sale 8:

https://backpack.tf/profiles/76561198061489334#!/compare/1544659200/1544745600

https://backpack.tf/profiles/76561198065284779#!/compare/1544572800/1544745600

Sold for 20 keys

Sale 9:

https://backpack.tf/profiles/76561198151678480#!/compare/1540425600/1540512000

https://backpack.tf/profiles/76561198142892266#!/compare/1540425600/1540512000

Bulk?

Sale 10:

https://backpack.tf/profiles/76561198142892266#!/compare/1540598400/1540684800

https://backpack.tf/profiles/76561198083415007#!/compare/1540684800/1540771200

Sold with 15 keys for Clair Handcraft

Low

Sale 11:

https://backpack.tf/profiles/76561198083415007#!/compare/1541030400/1541376000

https://backpack.tf/profiles/76561198353025489#!/compare/1541203200/1541462400

Way high

Total sales @:

15, 16, 18, 20, 20, 22 keys

Playing it safe and calling 22 outlier based on seller at 20(I would think it won't sell)

https://backpack.tf/item/2155335624 <-- 20 seller

Polars Part:

Buyers at 15+. I think I would go with 18-22 for the range here.

https://backpack.tf/profiles/76561198061376237#!/compare/1547683200/1547942400

https://backpack.tf/profiles/76561198202919499#!/compare/1547683200/1548028800

Another sale at 22 keys.