Sale 1:

https://backpack.tf/profiles/76561198080179568#!/compare/1583366400/1583452800

https://backpack.tf/profiles/76561198346188716#!/compare/1582675200/1584835200

Keys

sale 2:

https://backpack.tf/profiles/76561198346188716#!/compare/1585094400/1585526400

https://backpack.tf/profiles/76561198026129220#!/compare/1585440000/1585526400

qS

sale 3:

https://backpack.tf/profiles/76561197999873164#!/compare/1583366400/1583452800

https://backpack.tf/profiles/76561199002198676#!/compare/1583625600/1583884800

SCM

sale 4:

https://backpack.tf/profiles/76561199002198676#!/compare/1584230400/1585440000

https://backpack.tf/profiles/76561198418740133#!/compare/1585267200/1585353600

Sold with ~1.74 keys in sweets for Max Head (~17)

total is ~15 keys

Sale 5:

https://backpack.tf/profiles/76561198280667527#!/compare/1585094400/1585353600

https://backpack.tf/profiles/76561198152434713#!/compare/1585267200/1585353600

Sold for Stormy Lucky + 5 keys

Lucky Mini:

https://backpack.tf/suggestion/5ec3868b5d53a832f4316f22

Suggestion for 14.5 keys

Total is 19.5 keys

https://bot.tf/stats/listings/Y5ZRXWP5

B/O of 21 keys

sale 6:

https://backpack.tf/profiles/76561198152434713#!/compare/1585440000/1585526400

https://backpack.tf/profiles/76561198175367966#!/compare/1585440000/1585526400

Bulk

sale 7:

https://backpack.tf/profiles/76561198175367966#!/compare/1585440000/1585526400

https://backpack.tf/profiles/76561198827124516#!/compare/1585440000/1585526400

Bulk

sale 8:

https://backpack.tf/profiles/76561198827124516#!/compare/1585526400/1585612800

https://backpack.tf/profiles/76561198002757046#!/compare/1585526400/1585612800

QS

sale 9:

https://marketplace.tf/items/tf2/30623;5;u60

$40 / $1.87 = 21.39 keys <-- https://backpack.tf/item/7857592330

Sale 10:

https://backpack.tf/profiles/76561198166763414#!/compare/1582243200/1582416000

https://backpack.tf/profiles/76561198172690987#!/compare/1582243200/1582329600

QS

sale 11:

https://backpack.tf/profiles/76561198172690987#!/compare/1582416000/1582329600

https://backpack.tf/profiles/76561198337734785#!/compare/1582329600/1582416000

QS

sale 12:

https://backpack.tf/profiles/76561198337734785#!/compare/1584230400/1584316800

https://backpack.tf/profiles/76561198263902547#!/compare/1584144000/1584316800

Sold for ~16 keys

sale 13:

https://backpack.tf/profiles/76561198988881846#!/compare/1587427200/1588636800

https://backpack.tf/profiles/76561198263902547#!/compare/1589328000/1589414400

Untrace

Total sales @:

15, 16, 20, 21 keys

buyers up to 15 keys,

seller for nearly a month at 17 keys,

https://i.imgur.com/JswA0dC.jpg

taking 16 - 20 keys.