Deja Vu.

Sale 1:

https://backpack.tf/profiles/76561197976524938#!/compare/1566172800/1566259200

https://backpack.tf/profiles/76561198083872093#!/compare/1566259200/1566345600

Sold with 6 keys for CTFL Interface

only sale, use there

Sale 2:

https://backpack.tf/profiles/76561198083872093#!/compare/1573603200/1573776000

https://backpack.tf/profiles/76561197963038974#!/compare/1573516800/1573603200

Bulky

Sale 3:

https://backpack.tf/profiles/76561197963038974#!/compare/1573516800/1573603200

https://backpack.tf/profiles/76561198253483866#!/compare/1573516800/1573603200

Sold for 16 keys

Sale 4:

https://backpack.tf/profiles/76561198253483866#!/compare/1573516800/1573603200

https://backpack.tf/profiles/76561198113771976#!/compare/1573516800/1573603200

Sold for Smoking Noble(13.5) + negligible sweets

Sale 5:

https://backpack.tf/profiles/76561198113771976#!/compare/1573776000/1573862400

https://backpack.tf/profiles/76561198356061896#!/compare/1573430400/1573862400

Sold for ~9.5 keys(?) could be more...

Sale 6:

https://backpack.tf/profiles/76561197964478868#!/compare/1573516800/1573948800

https://backpack.tf/profiles/76561198356061896#!/compare/1573862400/1573948800

https://backpack.tf/profiles/76561197964478868#!/compare/1573516800/1573948800

https://backpack.tf/profiles/76561198532928971#!/compare/1573862400/1573948800

https://backpack.tf/profiles/76561198142967798#!/compare/1573862400/1573948800

Untrace / bulk

Sale 7:

https://backpack.tf/profiles/76561198143525320#!/compare/1569283200/1570147200

https://backpack.tf/profiles/76561198390528625#!/compare/1571529600/1571529600

Untrace

sale 8:

https://backpack.tf/profiles/76561198975648195#!/compare/1567814400/1567900800

'https://backpack.tf/profiles/76561198298473489#!/compare/1567641600/1567900800

Untrace

Sale 9:

https://backpack.tf/profiles/76561198298473489#!/compare/1567900800/1567987200

https://backpack.tf/profiles/76561198262727995#!/compare/1567900800/1567987200

Bulk

Sale 10:

https://backpack.tf/profiles/76561198262727995#!/compare/1567900800/1567987200

https://backpack.tf/profiles/76561198097102281#!/compare/1567900800/1567987200

Untrace

Sale 11:

https://backpack.tf/profiles/76561198097102281#!/compare/1569628800/1569715200

https://backpack.tf/profiles/76561198212969373#!/compare/1569628800/1569715200

Sold for 11 keys

Sale 12:

https://marketplace.tf/items/tf2/30969;5;u11

$17.12 / $1.82 = 9.41 keys

$29.99 / $1.82 = 16.48 keys

$36 / $1.83 = 19.67 keys <-- https://backpack.tf/item/7124203259

Total sales @:

9.41, 9.5, 11, 13..5, 16, 16.48, 19.47 keys

buyers up to 8.5 keys,

https://bot.tf/stats/listings/Y8EOG58Z

16 key seller has been listing on and off for at least 2 months (could be more),

calling 2 outliers on each side,

taking 11 - 16 keys.