Sale 1:

https://backpack.tf/profiles/76561198290980518#!/compare/1547683200/1547769600

scam/moved to alt

Sale 2:

https://backpack.tf/profiles/76561198134538517#!/compare/1547769600/1547856000

10k - below buyorders

Sale 3:

https://backpack.tf/profiles/76561198355020607#!/compare/1548720000/1549497600

14 keys

Sale 4:

https://backpack.tf/profiles/76561198355020607#!/compare/1549497600/1549584000

10 keys 20 refs, below buyorders

Sale 5:

https://backpack.tf/profiles/76561198081642376#!/compare/1549670400/1550361600

idk

Sale 6:

https://backpack.tf/profiles/76561198330552218#!/compare/1548806400/1549152000

10k, low

Sale 7:

https://backpack.tf/profiles/76561198242646048#!/compare/1549238400/1549324800

12keys + festivized strange minigun, could not find what it was sold after the trade, could not find proper mini, as marketplace sales are older than a month,

scm sales are over 1.5 keys, the minigun has sellers down to 1.3ish keys tho, so will be in-range anyways

Sale 8:

https://backpack.tf/profiles/76561198275639272#!/compare/1549238400/1549929600

SCM, between Feb 9 - 13 there was a sale at Feb 12, so I suppose that was this one's sale (as he sold it to scrap bot on Feb 13)

https://steamcommunity.com/market/listings/440/Unusual%20Scotsman%27s%20Stove%20Pipe

https://steamcommunity.com/market/listings/440/Mann%20Co.%20Supply%20Crate%20Key

26.81€/1.97€= 13.6 keys

Sale 9:

https://backpack.tf/profiles/76561198275639272#!/compare/1549929600/1551225600

scrap sale for idk what

Sale 10:

https://backpack.tf/profiles/76561198135388328#!/compare/1550793600/1551139200

https://backpack.tf/profiles/76561198845896241#!/compare/1550793600/1550880000

idk

Sale 11:

https://backpack.tf/profiles/76561198847593221#!/compare/1550880000/1551052800

https://backpack.tf/profiles/76561198845896241#!/compare/1550966400/1551139200

idk

Sale 12:

https://backpack.tf/profiles/76561198847593221#!/compare/1550966400/1551312000

https://backpack.tf/profiles/76561198799377314#!/compare/1550448000/1551225600

idk

Sale 13:

https://backpack.tf/profiles/76561198799377314#!/compare/1551571200/1552003200

https://backpack.tf/profiles/76561198346618954#!/compare/1551830400/1551916800

9 keys?

Sale 14:

https://backpack.tf/profiles/76561198346618954#!/compare/1551916800/1552089600

11 keys + 18 refs

Sale 15:

https://backpack.tf/profiles/76561198127258497#!/compare/1552003200/1552435200

https://backpack.tf/profiles/76561198216712921#!/compare/1551657600/1552348800

idk

Sales at 11.40 keys, 13.3 keys 13.6 keys and 14 keys

I would not include 11.4 sale, as it was sold in a day, and 13.3-13.6-14 keys seems to be the right trading point, So 13-14 keys.