Sale 1:

Sold for 20 keys + ~1 key in ref

http://www.tf2outpost.com/trade/29277950 - B/O of 21

Seller: https://backpack.tf/profiles/76561198021055079#!/compare/1500163200/1500249600

Buyer: https://backpack.tf/profiles/76561198210306597#!/compare/1500163200/1500249600

X = 21

Sale 2:

Sold for Smoking Dragonborn Helm (11) + Batsaber (~9.5) + ~0.5 keys in items

http://www.tf2outpost.com/trade/29346685 - B/O of 20

Seller: https://backpack.tf/profiles/76561198072240925#!/compare/1503964800/1504137600

Buyer: https://backpack.tf/profiles/76561198332376002#!/compare/1498176000/1505779200

X = 20 (Capped by B/O)

Sale 3:

Sold for 19 keys

No outpost

Seller: https://backpack.tf/profiles/76561198049884052#!/compare/1505606400/1505779200

Buyer: https://backpack.tf/profiles/76561197994034714#!/compare/1505692800/1505779200

X = 19

Sale 4:

Sold for 19 keys

No outpost

Seller: https://backpack.tf/profiles/76561198341171690#!/compare/1503446400/1503532800

Buyer: https://backpack.tf/profiles/76561198211313779#!/compare/1503446400/1503532800

X = 19

Sale 5:

Sold for Kill-a-Watt Baker Boy + Minor items

Seller: https://backpack.tf/profiles/76561198332376002#!/compare/1505779200/1506124800

Buyer: https://backpack.tf/profiles/76561198166939443#!/compare/1505865600/1506124800

Was used on the Baker Boy. Can’t use here.

Sale 6:

Bulk for Ancient Codex Spacemann

Seller: https://backpack.tf/profiles/76561198275179429#!/compare/1507420800/1507507200

Buyer: https://backpack.tf/profiles/76561198139732126#!/compare/1507420800/1507507200

Sale 7:

Sold for Peace Sign Sola Topi + 10 keys + ~1 key in items

http://www.tf2outpost.com/trade/29393168 - No B/O

Seller: https://backpack.tf/profiles/76561198139732126#!/compare/1507420800/1507507200

Buyer: https://backpack.tf/profiles/76561198193861449#!/compare/1507420800/1507507200

Don’t wanna use this sale without a B/O. Will most likely fall in the range here anyways.

Sellers:

24 keys:

https://i.imgur.com/Z1Hjutl.png - 5 months

Sales at:

19 (2x)

20

21

Going with 19-21.