Using last month.

Sale 1:

Sold for 3 keys + 4 ref (ID’s match)

Seller: https://backpack.tf/profiles/76561198305676157#!/compare/1563235200/1563321600

Buyer: https://backpack.tf/profiles/76561198049322925#!/compare/1563235200/1563321600

https://backpack.tf/item/5440301090

https://i.imgur.com/hVdcK00.png - bot.tf confirms

7932206162 - near ID

X = 3

Sale 2:

Sold for 3 keys

Seller: https://backpack.tf/profiles/76561198076190940#!/compare/1564444800/1565136000

Buyer: https://backpack.tf/profiles/76561198327624724#!/compare/1564876800/1564963200

https://backpack.tf/item/4212413237

X = 3

Sale 3:

Sold to a bot for 2 keys + 38 ref

Seller: https://backpack.tf/profiles/76561198112516663#!/compare/1562544000/1562630400

Buyer: https://backpack.tf/profiles/76561198340634356#!/compare/1562544000/1562630400

https://backpack.tf/item/3857003531

https://i.imgur.com/hVdcK00.png - bot.tf confirms

X = 2.5

Sale 4:

Sold to a bot for 2 keys + 37 ref

Seller: https://backpack.tf/profiles/76561198236985112#!/compare/1563235200/1563321600

Buyer: https://backpack.tf/profiles/76561198305676157#!/compare/1563235200/1563321600

https://backpack.tf/item/5440301090

https://i.imgur.com/hVdcK00.png - bot.tf confirms

X = 2.5

Other Sales:

https://backpack.tf/item/5440301090 (#1)

https://backpack.tf/item/4462438226 (#2 & #3)

https://backpack.tf/item/4379536158 (#4)

https://backpack.tf/item/4370020879 (#5)

https://backpack.tf/item/4328327080 (#6 & #7)

https://backpack.tf/item/3838199337 (#8-11)

https://backpack.tf/item/3857003531 (#12 & #13)

https://backpack.tf/item/7916091388 - scammed

https://backpack.tf/item/6606100922 - scrap

https://backpack.tf/item/4781857388 - wasn’t unusual at the time

https://backpack.tf/item/4239378419 - marketplace

https://backpack.tf/item/3596155348 - mannco/scrap/gambled

https://backpack.tf/item/3600994088 - gambled/marketplace

#1

Bulk

https://backpack.tf/profiles/76561198150928662#!/compare/1563321600/1563408000

https://backpack.tf/profiles/76561198342161127#!/compare/1563321600/1563408000

#2

Untraceable/bulk

https://backpack.tf/profiles/76561198136639905#!/compare/1562716800/1562803200

https://backpack.tf/profiles/76561197992585624#!/compare/1562457600/1562803200

#3

Untraceable

https://backpack.tf/profiles/76561197992585624#!/compare/1562889600/1562976000

https://backpack.tf/profiles/76561198088459414#!/compare/1562457600/1563321600

#4

Untraceable

https://backpack.tf/profiles/76561198101155855#!/compare/1564531200/1564617600

https://backpack.tf/profiles/76561198377214184#!/compare/1563321600/1564876800

#5

SCM

https://backpack.tf/profiles/76561198346021317#!/compare/1562803200/1563494400

https://backpack.tf/profiles/76561198346021317#!/compare/1562803200/1563494400

#6

Untraceable

https://backpack.tf/profiles/76561198340634356#!/compare/1564444800/1564531200

https://backpack.tf/profiles/76561198202209948#!/compare/1554163200/1564531200

https://i.imgur.com/hVdcK00.png - labelled as a 3 key sale

#7

Untraceable

https://backpack.tf/profiles/76561198257690413#!/compare/1562112000/1565136000

https://backpack.tf/profiles/76561198340634356#!/compare/1562716800/1562803200

https://i.imgur.com/hVdcK00.png - labelled as a 2 key + 38 ref purchase (~2.5 keys)

#8 & #9

Both untraceable

https://backpack.tf/profiles/76561198340634356#!/compare/1562544000/1562630400

https://backpack.tf/profiles/76561198063075911#!/compare/1562544000/1562630400

https://backpack.tf/profiles/76561198340634356#!/compare/1562630400/1562716800

https://i.imgur.com/hVdcK00.png - labelled as a 3 key + 8 ref sale (~3 keys) and a 2 key + 38 ref purchase (~2.5 keys)

#10

Untraceable

https://backpack.tf/profiles/76561198340634356#!/compare/1564272000/1564358400

https://backpack.tf/profiles/76561198070848827#!/compare/1564272000/1564358400

https://i.imgur.com/hVdcK00.png - labelled as a 3 key sale

#11

Untraceable

https://backpack.tf/profiles/76561198212896283#!/compare/1564531200/1564617600

https://backpack.tf/profiles/76561198363395191#!/compare/1564704000/1564790400

Most likely not the seller here. Would’ve come from an unscanned backpack and dumped to the bot

#12

Bulk for Secret Executioner

https://backpack.tf/profiles/76561198967685813#!/compare/1562544000/1562630400

https://backpack.tf/profiles/76561198112516663#!/compare/1562544000/1562630400

#13

Untraceable

https://backpack.tf/profiles/76561198340634356#!/compare/1562630400/1562716800

https://backpack.tf/profiles/76561198361451660#!/compare/1562630400/1562716800

https://i.imgur.com/hVdcK00.png - labelled as a 3 key + 8 ref sale

Gambled afterwards.

Sellers:

https://i.imgur.com/D5cMZ73.png

https://backpack.tf/item/6272718530 - ~3.2 keys

https://backpack.tf/item/5387575222 - ~3.2 keys

Sales at:

2.5 (2x)

3 (2x)

No need to look into the marketplace sales, the common trading point is well defined here, and supported by sellers/buyers. Regardless, here is the link to the marketplace page for this item: https://marketplace.tf/items/tf2/30614;5;u3001

Going with 2.5-3.

Closing as per new rounding rule, as well as new possible sales. May pick this up again if this item is untouched during the suggestion event.