Sale 1:

https://backpack.tf/profiles/76561198157688219#!/compare/1585958400/1586044800

https://backpack.tf/profiles/76561198119556478#!/compare/1585958400/1586044800

Bulk

sale 2:

https://backpack.tf/profiles/76561198119556478#!/compare/1586044800/1586217600

https://backpack.tf/profiles/76561198341480941#!/compare/1585785600/1586217600

Sold for 8 keys, maybe more?

sale 3:

https://backpack.tf/profiles/76561198341480941#!/compare/1586217600/1586304000

https://backpack.tf/profiles/76561198374204787#!/compare/1586217600/1586304000

Untrace

sale 4:

https://backpack.tf/profiles/76561198374204787#!/compare/1586390400/1586649600

https://backpack.tf/profiles/76561198308422197#!/compare/1574812800/1588118400

Untrace

sale 5:

https://backpack.tf/profiles/76561198883615002#!/compare/1589155200/1589241600

https://backpack.tf/profiles/76561198327468683#!/compare/1589155200/1589241600

https://backpack.tf/profiles/76561198883615002#!/compare/1589155200/1589241600

tradeback

sale 6:

https://backpack.tf/profiles/76561198010991677#!/compare/1581465600/1581552000

https://backpack.tf/profiles/76561198337734785#!/compare/1581379200/1581465600

Sold for ~8 keys (QS)

sale 7:

https://backpack.tf/profiles/76561198337734785#!/compare/1583193600/1583280000

https://backpack.tf/profiles/76561198010991677#!/compare/1583193600/1583280000

Sold for 12 keys

sale 8:

https://backpack.tf/profiles/76561198010991677#!/compare/1585699200/1585785600

https://backpack.tf/profiles/76561198337734785#!/compare/1585699200/1585785600

QS

sale 9:

https://backpack.tf/profiles/76561198892084729#!/compare/1584057600/1584144000

https://backpack.tf/profiles/76561198227038900#!/compare/1584144000/1584489600

Sold for Searing Handcraft

Handcraft mini:

https://backpack.tf/suggestion/5ebb6ec8bfe82e62cc177c2e

Suggestion for 12.5 keys

sale 10:

https://marketplace.tf/items/tf2/30658;5;u36

$27.99 / $1.87 = 14.97 keys

Total sales @:

12, 13, 15 keys

buyers up to ~8.5 keys,

https://bot.tf/stats/listings/4WXQ20DZ

unsold for 12 keys for at least a month,

new seller for 11 keys,

https://backpack.tf/item/8771220581

watching 11 seller,

taking 12 - 13 keys, for now.