Sale 1:

https://backpack.tf/profiles/76561198082377587#!/compare/1580169600/1580428800

https://backpack.tf/profiles/76561198170140570#!/compare/1580342400/1580428800

Sold with 1 key for CPS Aviator

Aviator mini:

https://backpack.tf/suggestion/5ea4f8a8f3d72a65fc334c88

Suggestion for 17.5 keys

total is 16.5 keys

Sale 2:

https://backpack.tf/profiles/76561198170140570#!/compare/1580428800/1580601600

https://backpack.tf/profiles/76561198356878131#!/compare/1580515200/1580601600

Keys or Warming, can't tell.

sale 3:

https://backpack.tf/profiles/76561198356878131#!/compare/1581465600/1581638400

https://backpack.tf/profiles/76561198275711217#!/compare/1581379200/1581638400

Sold for Strange TW Herald + 1 key

use there

https://bot.tf/stats/listings/MXQJ9D0P

B/O of 12 keys

sale 4:

https://backpack.tf/profiles/76561198275711217#!/compare/1581638400/1581724800

https://backpack.tf/profiles/76561198796395930#!/compare/1581638400/1581724800

Sold for 10 keys

sale 5:

https://backpack.tf/profiles/76561198796395930#!/compare/1581811200/1581897600

https://backpack.tf/profiles/76561198142307778#!/compare/1581811200/1581897600

Sold for Bubbling Drill + 1 key

Drill Mini:

https://backpack.tf/suggestion/5ea51bc9c6fc875f8a2a1d1e

suggestion for 9.5 keys

Total is 10.5 keys

Sale 6:

https://backpack.tf/profiles/76561198142307778#!/compare/1581897600/1581984000

https://backpack.tf/profiles/76561198302443473#!/compare/1575244800/1581897600

Untrace

sale 7:

https://backpack.tf/profiles/76561198302443473#!/compare/1581897600/1581984000

https://backpack.tf/profiles/76561198125791160#!/compare/1581897600/1581984000

Sold with ~8 keys in sweets for Miami Pillar

use there

https://bot.tf/stats/listings/MVRON3D6

B/O of 14 keys

Sale 8:

https://backpack.tf/profiles/76561198125791160#!/compare/1583193600/1583280000

https://backpack.tf/profiles/76561198153426662#!/compare/1583280000/1583539200

Sold with negligible sweets for 11 keys

Sale 9:

https://backpack.tf/profiles/76561198153426662#!/compare/1583539200/1583625600

https://backpack.tf/profiles/76561198059042690#!/compare/1583539200/1583625600

Bulk

Sale 10:

https://backpack.tf/profiles/76561198059042690#!/compare/1587254400/1587427200

https://backpack.tf/profiles/76561198086948995#!/compare/1587340800/1587427200

Bulk

sale 11:

https://backpack.tf/profiles/76561198011321852#!/compare/1583193600/1583280000

https://backpack.tf/profiles/76561198395023947#!/compare/1583280000/1583366400

Sold for 20 keys

Sale 12:

https://backpack.tf/profiles/76561198395023947#!/compare/1584144000/1584230400

https://backpack.tf/profiles/76561198011321852#!/compare/1584144000/1584230400

Bulk

Sale 13:

https://marketplace.tf/items/tf2/31000;5;u112

$19.95 / $1.78 = 11.21 keys <--- https://backpack.tf/item/7258571615

$23 / $1.77 = 12.99 keys

$29.99 / $1.76 = 17.04 keys

total sales @:

10, 10.5, 11, 11, 13, 16.5, 17, 20 keys

buyers up to 9.5 keys,

2 month unsold for 12 keys:

https://i.imgur.com/pbFd2Nu.jpg

taking 11 - 13 keys, conserving around unsold.