Sale 1:

https://backpack.tf/profiles/76561198393785323#!/compare/1551398400/1551657600

https://backpack.tf/profiles/76561198079955710#!/compare/1551657600/1551744000

Untrace

Sale 2:

https://backpack.tf/profiles/76561198079955710#!/compare/1551744000/1551916800

https://backpack.tf/profiles/76561198114402400#!/compare/1551657600/1551744000

Bulk?

Sale 3:

https://backpack.tf/profiles/76561198092033003#!/compare/1549929600/1553040000

https://backpack.tf/profiles/76561198211416633#!/compare/1549843200/1549929600

Sold for 22 keys

Sale 4:

https://backpack.tf/profiles/76561198046132370#!/compare/1547078400/1547164800

https://backpack.tf/profiles/76561198132601722#!/compare/1547078400/1547164800

Sold with G Fetti Pillar(18) + 3 keys for Burning Airdog(40)

https://backpack.tf/item/6987789138 <-- History of airdog

bulky

Sale 5:

https://backpack.tf/profiles/76561198132601722#!/compare/1552176000/1552262400

https://backpack.tf/profiles/76561198872891264#!/compare/1552176000/1552262400

Sold for Bubbling Fragger

Use there

https://bot.tf/stats/listings/4OW26WWM

B/O of 30 keys

Sale 6:

https://backpack.tf/profiles/76561198002757046#!/compare/1550534400/1550620800

https://backpack.tf/profiles/76561198092541990#!/compare/1550534400/1550620800

Sold for 23 keys

Sale 7:

https://backpack.tf/profiles/76561198092541990#!/compare/1550793600/1550880000

https://backpack.tf/profiles/76561198309237889#!/compare/1550448000/1550880000

Low?

Sale 8:

https://backpack.tf/profiles/76561198309237889#!/compare/1550448000/1550880000

https://backpack.tf/profiles/76561198306645854#!/compare/1550793600/1550880000

Sold with 4 keys for OF Cold Killer

Use there

Sale 9:

https://backpack.tf/profiles/76561198306645854#!/compare/1550880000/1551312000

https://backpack.tf/profiles/76561198166125772#!/compare/1551225600/1551312000

Sold for Strange Searing Airdog

Use there

https://bot.tf/stats/listings/4Z1VEZXY

B/O of 25 keys

Sale 10:

https://backpack.tf/profiles/76561198166125772#!/compare/1551484800/1551657600

https://backpack.tf/profiles/76561198341171690#!/compare/1551484800/1551571200

QS to bot

Sale 11:

https://backpack.tf/profiles/76561198341171690#!/compare/1551916800/1552003200

https://backpack.tf/profiles/76561198362008411#!/compare/1551916800/1552003200

Untrace

Sale 12:

https://backpack.tf/profiles/76561198126360598#!/compare/1550361600/1551744000

https://backpack.tf/profiles/76561198081042493#!/compare/1551398400/1551484800

Untrace

Sale 13:

https://backpack.tf/profiles/76561198081042493#!/compare/1551398400/1551484800

https://backpack.tf/profiles/76561198048748832#!/compare/1547596800/1551484800

Sold with 21 keys + ~2 keys in sweets

Total is 23 keys

Sale 14:

https://backpack.tf/profiles/76561198048748832#!/compare/1551484800/1551744000

https://backpack.tf/profiles/76561198394965271#!/compare/1551657600/1551744000

Sold for Vivid Halogen + 3 keys

https://bot.tf/stats/listings/4WJXWKXM

B/O of 24 keys

Use there

Sale 15:

https://backpack.tf/profiles/76561198402407325#!/compare/1547251200/1552089600

https://backpack.tf/profiles/76561198223460332#!/compare/1532736000/1554422400

Untrace

Sale 16:

https://backpack.tf/profiles/76561198111049983#!/compare/1550361600/1550793600

https://backpack.tf/profiles/76561198074924284#!/compare/1550707200/1550793600

Bulk

Sale 17:

https://backpack.tf/profiles/76561198040812694#!/compare/1547078400/1547164800

https://backpack.tf/profiles/76561198189299282#!/compare/1547078400/1547164800

Sold for Miami Deep Cover

Use there

Sale 18:

https://backpack.tf/profiles/76561198189299282#!/compare/1547337600/1547424000

https://backpack.tf/profiles/76561198056571743#!/compare/1547337600/1547424000

Sold with ~10 keys in sweets for Smoking TC(35.5)

Total is 25.5 keys

https://bot.tf/stats/listings/4RWKL1DM

B/O of 40 keys

Sale 19:

https://backpack.tf/profiles/76561198056571743#!/compare/1547337600/1547424000

https://backpack.tf/profiles/76561198335791307#!/compare/1547337600/1547424000

QS to bot, 19 keys

Sale 20:

https://backpack.tf/profiles/76561198335791307#!/compare/1551657600/1551744000

https://backpack.tf/profiles/76561198362008411#!/compare/1551657600/1551744000

Untrace

Sale 21:

https://backpack.tf/profiles/76561198372942066#!/compare/1547856000/1553126400

https://backpack.tf/profiles/76561198208582767#!/compare/1553040000/1553126400

Untrace

Sale 22:

https://backpack.tf/profiles/76561198208582767#!/compare/1553385600/1553472000

https://backpack.tf/profiles/76561198091045265#!/compare/1549411200/1553472000

Untrace

Sale 23:

https://backpack.tf/profiles/76561198091045265#!/compare/1549411200/1553472000

https://backpack.tf/profiles/76561198060837654#!/compare/1553472000/1553558400

Untrace

Sale 24:

https://backpack.tf/profiles/76561198164843987#!/compare/1554508800/1554595200

https://backpack.tf/profiles/76561198841365001#!/compare/1554508800/1554595200

https://backpack.tf/profiles/76561198040384479#!/compare/1554595200/1554681600

Untrace / bulk?

Sale 25:

https://marketplace.tf/items/31016;5;u111

$45.00 / $1.75 = 25.71 keys

Total sales @:

19, 22, 23, 25.5, 25.71 keys

Sellers down to 30 keys,

Buyers up to 20 keys,

Taking 22 - 26 keys.