Sale 1-3

https://marketplace.tf/items/tf2/30616;5;u3024

$9.22 / $1.77 = 5.21 keys

$23 / $1.76 = 13.07 keys // https://backpack.tf/item/4434224046

$22.7 / $1.69 = 13.43 keys // https://backpack.tf/item/4317886080 // b/o 17: https://imgur.com/a/8P1PZSv

Sale 4:

untrace

https://backpack.tf/profiles/76561198838394491#!/compare/1587513600/1587772800

https://backpack.tf/profiles/76561198358296372#!/compare/1587513600/1587600000

Sale 5:

5 keys

https://backpack.tf/profiles/76561198358296372#!/compare/1588032000/1588118400

https://backpack.tf/profiles/76561197994697258#!/compare/1588032000/1588118400

Sale 6:

9 keys

https://backpack.tf/profiles/76561198304001962#!/compare/1585440000/1585872000

https://backpack.tf/profiles/76561198113899098#!/compare/1585353600/1585440000

Sale 7:

bulk

https://backpack.tf/profiles/76561198023542238#!/compare/1582934400/1584403200

https://backpack.tf/profiles/76561198869506063#!/compare/1583020800/1583280000

Sale 8:

bulk

https://backpack.tf/profiles/76561198869506063#!/compare/1583452800/1583539200

https://backpack.tf/profiles/76561198190714350#!/compare/1583452800/1583539200

Sale 9:

with 4 keys for spelled item, no other sales on spelled item

https://backpack.tf/profiles/76561198190714350#!/compare/1583971200/1584057600

https://backpack.tf/profiles/76561198039846030#!/compare/1578528000/1584057600

Sale 10:

12 keys

https://backpack.tf/profiles/76561198314211872#!/compare/1582934400/1583020800

https://backpack.tf/profiles/76561198355092203#!/compare/1582934400/1583020800

Sale 11:

4 keys + 10 ref

https://backpack.tf/profiles/76561198355092203#!/compare/1583366400/1583452800

https://backpack.tf/profiles/76561198005032783#!/compare/1583280000/1583366400

==============================================================================

Sales:

4,5,5,9,12,13,13

buyers at 5 keys

https://imgur.com/a/JyHcwTL