Sale 1:

https://backpack.tf/profiles/76561198037782799#!/compare/1562976000/1563494400

https://backpack.tf/profiles/76561198101300189#!/compare/1562889600/1562976000

https://backpack.tf/profiles/76561198287198615#!/compare/1562889600/1562976000

https://backpack.tf/profiles/76561198848622849#!/compare/1562889600/1562976000

https://backpack.tf/profiles/76561198063075911#!/compare/1562889600/1562976000

https://backpack.tf/profiles/76561198081172172#!/compare/1562889600/1562976000

Gambling

Sale 2:

https://backpack.tf/profiles/76561198081172172#!/compare/1563321600/1563408000

https://backpack.tf/profiles/76561198037674114#!/compare/1563148800/1565827200

Untrace

sale 3:

https://backpack.tf/profiles/76561198317374063#!/compare/1567814400/1567900800

https://backpack.tf/profiles/76561198279539667#!/compare/1567641600/1567900800

Untrace

Sale 4:

https://backpack.tf/profiles/76561198279539667#!/compare/1567900800/1567987200

https://backpack.tf/profiles/76561198074718149#!/compare/1567900800/1567987200

Untrace

Sale 5:

https://backpack.tf/profiles/76561198977106732#!/compare/1568505600/1568678400

https://backpack.tf/profiles/76561198185241815#!/compare/1568592000/1568678400

Sold for 9 keys

Sale 6:

https://backpack.tf/profiles/76561198185241815#!/compare/1568592000/1568678400

https://backpack.tf/profiles/76561198054642670#!/compare/1568592000/1568678400

Sold for P Fetti Trilby

Trilby Mini:

https://backpack.tf/suggestion/5d9cfa72678072041e0bb726

Suggestion for 10 keys

Sale 7:

https://backpack.tf/profiles/76561198054642670#!/compare/1568851200/1568937600

https://backpack.tf/profiles/76561198171280806#!/compare/1555027200/1568937600

Sold for OF Brain + 1 key

Brain Mini:

https://backpack.tf/suggestion/5d9d013dd3817220eb040a94

Suggestion for 10.5 keys

Total is 11.5 keys

Sale 8:

https://backpack.tf/profiles/76561198171280806#!/compare/1570233600/1570320000

https://backpack.tf/profiles/76561198049688103#!/compare/1569974400/1570320000

Sold with 2 keys for Miami Honcho

use there

https://bot.tf/stats/listings/4JG1P1E7

B/O of 15 keys

Sale 9:

https://marketplace.tf/items/tf2/30162;5;u6

$25 / $1.82 = 13.74 keys

Total sales @:

9, 10, 11.5, 13.74 keys

buyers up to ~8.5 keys.

taking 10 - 14 keys.