Sale 1:

Sold for Strange Vivid Noble + Spec. KS Aussie Knife (16.5) + ~30 keys in items

http://www.tf2outpost.com/trade/29365988 - B/O of 65

Seller: https://backpack.tf/profiles/76561197994697258#!/compare/1505001600/1505088000

Buyer: https://backpack.tf/profiles/76561198247749514#!/compare/1505001600/1505088000

Easily caps.

X = 65 (Capped by B/O)

Sale 2:

Sold for Stormy Storm Well-Rounded Rifleman (53.5) + 14 keys

http://www.tf2outpost.com/trade/29385382 - B/O of 60

Seller: https://backpack.tf/profiles/76561198055617854#!/compare/1507507200/1507593600

Buyer: https://backpack.tf/profiles/76561198142235454#!/compare/1507507200/1507593600

X = 60 (Capped by B/O)

Sale 3:

Sold for Kill-a-Watt Hat of Cards (25) + Sunbeams Janissary Ketche + Green Black Hole Broadband Bonnet

http://www.tf2outpost.com/trade/29395142 - B/O of 57

Seller: https://backpack.tf/profiles/76561198159149142#!/compare/1507766400/1507939200

Buyer: https://backpack.tf/profiles/76561198088057122#!/compare/1507852800/1507939200

Will easily cap at the B/O.

X = 57 (Capped by B/O)

Sale 4:

Sold for 54 keys

No outpost

Seller: https://backpack.tf/profiles/76561198069513015#!/compare/1503446400/1503792000

Buyer: https://backpack.tf/profiles/76561198204433501#!/compare/1503705600/1503792000

X = 54

Sale 5:

Quicksold for 51 keys

Seller: https://backpack.tf/profiles/76561198122107265#!/compare/1504396800/1504483200

Buyer: https://backpack.tf/profiles/76561198286021479#!/compare/1504396800/1504483200

X = 51

Sale 6:

Quicksold for 49 keys

No outpost

Seller: https://backpack.tf/profiles/76561198142235454#!/compare/1507593600/1507680000

Buyer: https://backpack.tf/profiles/76561198159149142#!/compare/1507593600/1507680000

X = 49

Sale 7:

Bulk for Scorching Festive Tree

Seller: https://backpack.tf/profiles/76561198088057122#!/compare/1508198400/1508284800

Buyer: https://backpack.tf/profiles/76561198054945991#!/compare/1508198400/1508284800

Sale 8:

Bulk for SBTWC Luchadore

Seller: https://backpack.tf/profiles/76561198054945991#!/compare/1509408000/1509494400

Buyer: https://backpack.tf/profiles/76561198151883648#!/compare/1509321600/1509494400

Sale 9:

Sold for Insomnia Toadstool Topper + Infernal Smoke Results Are In + ~7 keys in pure/items

No B/Os on Outpost

Seller: https://backpack.tf/profiles/76561198125791160#!/compare/1505260800/1505347200

Buyer: https://backpack.tf/profiles/76561198272076942#!/compare/1505260800/1505347200

Don’t want to use a sale that we don’t know the B/O of, and especially with one of the items involved being a taunt. Excluding this sale.

Sale 10

Sold for Circling Heart Hot Doggerson

Seller: https://backpack.tf/profiles/76561198272076942#!/compare/1505347200/1505433600

Buyer: https://backpack.tf/profiles/76561198055617854#!/compare/1505347200/1505433600

Probably better to use on the Hot Doggerson with the 2-month old seller at 65.

Sale 11:

Bulk for Tesla Coil Coldsnap Cap

Seller: https://backpack.tf/profiles/76561198067060144#!/compare/1509667200/1509753600

Buyer: https://backpack.tf/profiles/76561198137477160#!/compare/1509753600/1510012800

Sale 12:

Sold for Starstorm Insomnia + Smoking Bone Dome + ~12 keys in pure/items

http://www.tf2outpost.com/trade/29360022 - B/O of 58

Seller: https://backpack.tf/profiles/76561198197287330#!/compare/1504915200/1505001600

Buyer: https://backpack.tf/profiles/76561198065957709#!/compare/1504915200/1505001600

Should cap at the B/O, or at least fall in the range.

Sellers:

69 keys:

https://i.imgur.com/Zy8EtZ7.png - 21 days

https://backpack.tf/u/76561198054758757

70 keys:

https://i.imgur.com/hf5yMwa.png - 1 day, lowered/re-listed

http://www.tf2outpost.com/trade/29421793 - 1 week here

72 keys:

https://i.imgur.com/32oC7H4.png

Sales at:

49

51

54

57

60

65

49 and 51 quicksold, excluding them.

Going with 54-65.