Sale 1:

https://backpack.tf/profiles/76561198308772967#!/compare/1564099200/1564444800

https://backpack.tf/profiles/76561198026129220#!/compare/1564444800/1564531200

Bulk / transfer

Sale 2:

https://backpack.tf/profiles/76561198172592975#!/compare/1564876800/1564963200

https://backpack.tf/profiles/76561198112281935#!/compare/1564876800/1564963200

SCM

Sale 3:

https://backpack.tf/profiles/76561198177864033#!/compare/1561507200/1563494400

https://backpack.tf/profiles/76561198337734785#!/compare/1563408000/1563494400

Sold for 11 keys

Sale 4:

https://backpack.tf/profiles/76561198337734785#!/compare/1563408000/1563494400

https://backpack.tf/profiles/76561198264036319#!/compare/1563494400/1563580800

Sold for ~13 keys(one used to buy kunai)

Sale 5:

https://backpack.tf/profiles/76561198264036319#!/compare/1565222400/1565308800

https://backpack.tf/profiles/76561198083829532#!/compare/1565222400/1565308800

QS for 9 keys(?)

Sale 6:

https://backpack.tf/profiles/76561198083829532#!/compare/1565308800/1565395200

https://backpack.tf/profiles/76561198243519680#!/compare/1565222400/1565308800

Sold for ~8 keys?

Sale 7:

https://backpack.tf/profiles/76561198060458887#!/compare/1565308800/1565395200

https://backpack.tf/profiles/76561198309825646#!/compare/1565308800/1565395200

Untrace

Sale 8:

https://backpack.tf/profiles/76561198309825646#!/compare/1565308800/1565395200

https://backpack.tf/profiles/76561198108094239#!/compare/1565222400/1565395200

Untrace

Sale 9:

https://backpack.tf/profiles/76561198108094239#!/compare/1565395200/1565481600

https://backpack.tf/profiles/76561198103625435#!/compare/1565395200/1565481600

Sold for Orb Motif

Motif Mini:

https://backpack.tf/suggestion/5d5d0179d381726268130bdc

Suggestion for 14 keys

https://bot.tf/stats/listings/4OV9ZZGG

B/O of 13 keys, capping

Sale 10:

https://backpack.tf/profiles/76561198053720151#!/compare/1559260800/1559347200

https://backpack.tf/profiles/76561198240537922#!/compare/1559174400/1559260800

https://backpack.tf/profiles/76561198027152204#!/compare/1559174400/1559260800

Untrace

Sale 11:

https://backpack.tf/profiles/76561198100484031#!/compare/1559347200/1559433600

https://backpack.tf/profiles/76561198880384227#!/compare/1558742400/1559520000

https://backpack.tf/profiles/76561198140012738#!/compare/1558224000/1559865600

Untrace

Sale 12:

https://backpack.tf/profiles/76561198131272664#!/compare/1561161600/1561248000

https://backpack.tf/profiles/76561198333694915#!/compare/1561161600/1561248000

Sold for OF Bonnet + 4 keys

Use there

Sale 13:

https://backpack.tf/profiles/76561198333694915#!/compare/1561248000/1561420800

https://backpack.tf/profiles/76561198127718182#!/compare/1561248000/1561420800

Sold for G Fetti Bonk + 1 key

Use there

Sale 14:

https://backpack.tf/profiles/76561198127718182#!/compare/1564876800/1564963200

https://backpack.tf/profiles/76561198453281086#!/compare/1562889600/1564876800

Sold for ~4 keys???

Sale 15, 16:

https://marketplace.tf/items/tf2/30007;5;u8

$28 / $1.81 = 15.47 keys <-- https://bot.tf/stats/listings/MXKJ0G6Y | https://backpack.tf/item/4397256273 B/O of 16.

$25 / $1.80 = 13.89 keys

Total sales @:

11, 13, 13.89, 14, 15.47 keys

Buyers before Crate Depression at 11 keys,

Taking 13 - 15 keys.