Sale 1:

Sold for Orbiting Planets Blast Defense (10)

No outpost

Seller: https://backpack.tf/profiles/76561198125082062#!/compare/1519344000/1519430400

Buyer: https://backpack.tf/profiles/76561198346506937#!/compare/1519344000/1519430400

X = 10

Sale 2:

Sold for 8 keys

Seller: https://backpack.tf/profiles/76561198301836632#!/compare/1518912000/1518998400

Buyer: https://backpack.tf/profiles/76561198166757198#!/compare/1504828800/1522540800

X = 8

Sale 3:

Sold with Festivizer (~1) for Nuts n’ Bolts Berliner’s Bucket Helm (Mini at ~8.75 below)

Seller: https://backpack.tf/profiles/76561198129995083#!/compare/1517875200/1517961600

Buyer: https://backpack.tf/profiles/76561198050272426#!/compare/1517875200/1517961600

X = 8

Sale 4:

Sold for 7 keys (IDs match)

https://backpack.tf/profiles/76561198362185176#!/compare/1523059200/1523145600

https://backpack.tf/profiles/76561198353268162#!/compare/1523145600/1523232000

X = 7

Sale 5:

Sold for 5 keys + 12 ref

Seller: https://backpack.tf/profiles/76561198048851745#!/compare/1520640000/1520726400

Buyer: https://backpack.tf/profiles/76561198354113551#!/compare/1520726400/1520812800

X = 5.5

Sale 6:

Sold with a cosmetic for Midnight Whirlwind Fubar Fanfare

Seller: https://backpack.tf/profiles/76561198256924017#!/compare/1518912000/1519516800

Buyer: https://backpack.tf/profiles/76561197994697258#!/compare/1519430400/1519516800

Can be used on the Whirlwind Fubar.

Sale 7:

Bulk for Voltaic Hat Protector UT

Seller: https://backpack.tf/profiles/76561198396115136#!/compare/1518912000/1518998400

Buyer: https://backpack.tf/profiles/76561198173389367#!/compare/1518912000/1518998400

Sale 8:

Bulk for lantern bicorne

https://backpack.tf/profiles/76561198173389367#!/compare/1522972800/1523059200

https://backpack.tf/profiles/76561198362185176#!/compare/1522972800/1523059200

Sale 9:

Bulk for keys probably

https://backpack.tf/profiles/76561198014763908#!/compare/1523232000/1523318400

https://backpack.tf/profiles/76561198091502579#!/compare/1523145600/1523232000

Nuts Berliner Mini:

Sale 1:

Nothing matches, but I can guarantee that it sold for 9 keys

Seller: https://backpack.tf/profiles/76561198305492646#!/compare/1518652800/1518739200

Buyer: https://backpack.tf/profiles/76561198369697018#!/compare/1518048000/1519603200

Sale 2:

(Currently) untraceable bot.tf sale at ~8.5 keys

https://i.imgur.com/yuYH4DS.png

Sellers:

7 keys:

https://i.imgur.com/VNiRmX7.png

https://backpack.tf/item/5375807116

8 keys:

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

https://backpack.tf/item/6629673195

10 keys:

https://i.imgur.com/4HXqWfl.png

https://backpack.tf/item/6542400269

24 keys:

https://i.imgur.com/R9HpIFz.png

https://backpack.tf/item/5161438079

25 keys:

https://i.imgur.com/qIjDdv4.png

https://backpack.tf/item/4966132263

Offers:

http://www.tf2outpost.com/trade/29606826

http://www.tf2outpost.com/trade/29594116

SCM:

https://i.imgur.com/6xdf4Lq.png

they fit in the range.

Sales at:

5.5

7

8 (2x)

10

Gonna exclude 10, given the cheaper sellers.

https://i.imgur.com/6xdf4Lq.png - buyers at ~5.5 keys on the SCM, and it seems low here, excluding.

Going with 7-8.