My owner told me to do some suggestion to get free premium :)

MP Sales:

Sale #1: $13.99 / $2.00 (https://manic.tf/keyprice/?at=2020-07-10) = 7 keys

Item history not found

Mannco.store sales:

Sale #2: $14.00 / $1.84 (2020-06-19) = 7.61 ~ 7.5 keys

Item history: https://backpack.tf/item/7479857456 (dated 2020-06-15)

B/O not available: https://gyazo.com/8cb2d2547bcb0df441b2f199ed3f4cbb

Item tracing:-

Item 1: https://backpack.tf/item/7130621080

Sale #3

untraced (only show 2 keys + 1 rec)

https://backpack.tf/profiles/76561198841279602#!/compare/1594166400/1594252800

https://backpack.tf/profiles/76561198154130501#!/compare/1593993600/1594252800

Sale #4

untraced

https://backpack.tf/profiles/76561198154130501#!/compare/1594252800/1594339200

https://backpack.tf/profiles/76561198195010153#!/compare/1594252800/1594425600

Sale #5

untraced (only show 1 key)

https://backpack.tf/profiles/76561198195010153#!/compare/1594684800/1595203200

https://backpack.tf/profiles/76561198276497172#!/compare/1594512000/1594684800

Item 2: https://backpack.tf/item/7479857456

skipping mannco.store withdrawal

skipping untraced sales by Quicksell.store bots

Sale #6

untraced

https://backpack.tf/profiles/76561198850274253#!/compare/1594080000/1594166400

https://backpack.tf/profiles/76561198139370347#!/compare/1594080000/1594166400

Sale #7

untraced (only show 1 key)

https://backpack.tf/profiles/76561198139370347#!/compare/1594339200/1594425600

https://backpack.tf/profiles/76561198331116901#!/compare/1594339200/1594684800

Sale #8

untraced (deposit to bot?)

https://backpack.tf/profiles/76561198331116901#!/compare/1594425600/1594684800

https://backpack.tf/profiles/76561199048451865#!/compare/1594857600/1594857600

Item 3: https://backpack.tf/item/7448009430

skipping trade that is almost outdated

skipping sales by Scrap.TF bot

Sale #9

Sold to a bot for 5 keys + 11.33 ref ~ 5 keys

https://backpack.tf/profiles/76561198121040682#!/compare/1591833600/1591920000 (ID: 8891448319)

https://backpack.tf/profiles/76561199043177646#!/compare/1591833600/1591920000 (ID: 8891448379)

Sale #10

untraced (only show 8 ref)

https://backpack.tf/profiles/76561199043177646#!/compare/1594252800/1594425600

https://backpack.tf/profiles/76561198145448039#!/compare/1592611200/1594425600

Current listings: https://gyazo.com/968d8b5cc71be8fc9f399653b720606f

Selling at 7 keys

Buying at 5.62, 5.6 keys

Valid sales: 7, 7.5, 5 keys

Excluding 5 keys since it is less than current buying price

Taking 7 - 7.5 keys