Sale 1:

https://backpack.tf/profiles/76561198006544512#!/compare/1567987200/1568073600

https://backpack.tf/profiles/76561198142349119#!/compare/1567987200/1568073600

Sold for 16 keys

sale 2:

https://backpack.tf/profiles/76561198142349119#!/compare/1569801600/1569888000

https://backpack.tf/profiles/76561198060549363#!/compare/1569715200/1572998400

Sold for ~16 keys

sAle 3:

https://backpack.tf/profiles/76561198402009056#!/compare/1569456000/1569542400

https://backpack.tf/profiles/76561197993834789#!/compare/1569283200/1569715200

Bulky

sale 4:

https://backpack.tf/profiles/76561198088878793#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198002757046#!/compare/1565913600/1566000000

Sold for ~12 keys (QS)

sale 5:

https://backpack.tf/profiles/76561198002757046#!/compare/1566345600/1566432000

https://backpack.tf/profiles/76561198046750499#!/compare/1566432000/1566518400

Sold for 14 keys

sale 6:

https://backpack.tf/profiles/76561198046750499#!/compare/1568851200/1570233600

https://backpack.tf/profiles/76561198068681977#!/compare/1570492800/1570579200

SCM

sale 7:

https://backpack.tf/profiles/76561198068681977#!/compare/1571961600/1572048000

https://backpack.tf/profiles/76561198002630665#!/compare/1571875200/1573257600

Untrace

sale 8:

https://backpack.tf/profiles/76561198153835113#!/compare/1566864000/1566950400

https://backpack.tf/profiles/76561198332869276#!/compare/1566864000/1566950400

Sold with ~1 key in sweets for Miami Trans

use there

sale 9:

https://backpack.tf/profiles/76561198332869276#!/compare/1566950400/1567036800

https://backpack.tf/profiles/76561198809353622#!/compare/1566950400/1567036800

Sold for CTFL Toy Soldier + ~2 keys in sweets

use there

Sale 10:

https://backpack.tf/profiles/76561198809353622#!/compare/1566950400/1567036800

https://backpack.tf/profiles/76561198082050096#!/compare/1566950400/1567036800

Sold with 2 keys for Miami Toy Soldier

Soldier is unstable: https://pastebin.com/N4aevjsN

sale 11:

https://marketplace.tf/items/tf2/465;5;u29

$28.49 / $1.81 = 15.74 keys <--- https://backpack.tf/item/1090902965

$30 / $1.80 = 16.67 keys

Total sales @:

12, 14, 15.74, 16, 16, 16.67 keys

buyers up to 11 keys (one high buyer at 15 keys),

2 month old seller for 16 keys,

https://i.imgur.com/ZlJuLSz.png

caling 12 low,

16.67 high,

taking 14 - 16 keys.