Item 1:

https://backpack.tf/item/16652579663

Sale 1:

https://backpack.tf/profiles/76561199472687979#!/compare/1772755200/1773014400

https://backpack.tf/profiles/76561199564942025#!/compare/1772668800/1772755200

Untrace, Dumped to STN

Sale 2:

https://backpack.tf/profiles/76561199564942025#!/compare/1772755200/1772841600

https://backpack.tf/profiles/76561198302399911#!/compare/1772755200/1772841600

Sold with 13.88 ref for 20 keys (20 keys match on buyers side)

Going with 20 keys flat

Sale 3:

https://backpack.tf/profiles/76561198302399911#!/compare/1772841600/1772928000

https://backpack.tf/profiles/76561198001070197#!/compare/1772668800/1773100800

Untrace?

Sale 4:

https://backpack.tf/profiles/76561198001070197#!/compare/1773532800/1773619200

https://backpack.tf/profiles/76561199389133702#!/compare/1773532800/1773619200

Dumped to a bot for 16 keys

Sale 5:

https://backpack.tf/profiles/76561199389133702#!/compare/1773619200/1773705600

https://backpack.tf/profiles/76561198069143099#!/compare/1773619200/1773705600

Untrace

These are for sales 3 & 5

https://marketplace.tf/items/tf2/31507;5;u34

Sold for $49.99 on the 8th of March

Sold for $35 on the 17th of March

Keys were $1.9 on the 8th

Keys were $1.92 on the 17th

8th sale (49.99/1.9) = 26.3 (Rounding to 26)

17th sale (35/1.92) = 18.22 (Rounding to 18)

//

Sellers:

BPTF - None

MPTF - https://marketplace.tf/items/tf2/31507;5;u34 - None

STN - https://stntrading.eu/item/tf2/Unusual+Bubbling+Polar+Charger - None

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Polar%20Charger?filter=Bubbling - None

Sale(s):

20, 16, 18 26

Going to exclude 16 due to generic buyers being at 16 keys. Additionally excluding the sale at 26 keys as it was dumped just over a week later for 16 keys.

Going with 18 - 20 keys