Sale 1:

Sold for Nebula HFoHA (70)

Seller: https://backpack.tf/profiles/76561198141054773#!/compare/1532044800/1532131200

Buyer: https://backpack.tf/profiles/76561198113216284#!/compare/1531699200/1532131200

https://backpack.tf/item/2164987158

X = 70

Sale 2:

Sold with 8 keys for Stormy Storm Hong Kong Cone (76)

Seller: https://backpack.tf/profiles/76561198086070401#!/compare/1535155200/1535328000

Buyer: https://backpack.tf/profiles/76561198273681900#!/compare/1535155200/1535241600

https://backpack.tf/item/6971560295

X = 68

Sale 3:

Sold for 65 keys

Seller: https://backpack.tf/profiles/76561198098367344#!/compare/1533168000/1533772800

Buyer: https://backpack.tf/profiles/76561198145572270#!/compare/1533686400/1533772800

https://backpack.tf/item/2164987158

X = 65

Sale 4:

Sold for 64 keys

Seller: https://backpack.tf/profiles/76561198119634686#!/compare/1534550400/1534636800

Buyer: https://backpack.tf/profiles/76561198177908233#!/compare/1534204800/1534636800

https://backpack.tf/item/2253385450

X = 64

Sale 5:

Sold for 64 keys

Seller: https://backpack.tf/profiles/76561198253093948#!/compare/1535846400/1535932800

Buyer: https://backpack.tf/profiles/76561198166314775#!/compare/1535673600/1535846400

https://backpack.tf/item/2164987158

http://prntscr.com/l19j38 - Credit to AJ

X = 64

Sale 6:

Sold for 58 keys in a day

Seller: https://backpack.tf/profiles/76561198081706519#!/compare/1536364800/1536451200

Buyer: https://backpack.tf/profiles/76561198081270783#!/compare/1536364800/1536451200

https://backpack.tf/item/2164987158

X = 58

Sale 7:

Sold for Burning Flames Sky High Fly Guy (Suggestion at 49.5)

Seller: https://backpack.tf/profiles/76561198011735059#!/compare/1526169600/1532044800

Buyer: https://backpack.tf/profiles/76561198141054773#!/compare/1531958400/1532044800

https://backpack.tf/item/2164987158

X = 50

Sale 8:

Sold for Duped Sunbeams Connoisseur's Cap + 6 keys

Seller: https://backpack.tf/profiles/76561198059611123#!/compare/1532649600/1533340800

Buyer: https://backpack.tf/profiles/76561198086070401#!/compare/1533081600/1533168000

https://backpack.tf/item/6971560295

No mini available on the Cap. Excluding.

Sale 9:

Sold with ~2 keys in skins for Disco Beat Down Hat With No Name

Seller: https://backpack.tf/profiles/76561198113216284#!/compare/1532649600/1532736000

Buyer: https://backpack.tf/profiles/76561198098367344#!/compare/1532649600/1532736000

https://backpack.tf/item/2164987158

May be better to use on the HWNN. Not worth gambling on whether or not this will change the range by half a key after doing a mini, given the buyer at 56.

Other Sales:

https://backpack.tf/item/6971560295 (#1)

https://backpack.tf/item/5939707953 (#2)

https://backpack.tf/item/2253385450 (#3)

https://backpack.tf/item/2164987158 (#4-8)

https://backpack.tf/item/2122938648 (#9 & #10)

#1

https://backpack.tf/profiles/76561198162609567#!/compare/1532131200/1532390400

https://backpack.tf/profiles/76561198059611123#!/compare/1528156800/1532563200

#2

Sold with spelled RL for Ooze Hellmet

https://backpack.tf/profiles/76561198277847330#!/compare/1531526400/1531612800

https://backpack.tf/profiles/76561198065409820#!/compare/1531526400/1531612800

Should be used on the hellmet.

#3

Untraceable, sold to a quickbuyer

https://backpack.tf/profiles/76561198177908233#!/compare/1535673600/1535846400

https://backpack.tf/profiles/76561198056793444#!/compare/1535760000/1535846400

Could probably work out how many keys were involved by counting the keys on the buyer's end, but i'm not about to do that after already having done that once here.

#4

Bulk for Death at Dusk Rifleman

https://backpack.tf/profiles/76561198145572270#!/compare/1533859200/1534291200

https://backpack.tf/profiles/76561198254285639#!/compare/1534118400/1534204800

#5

Bulk-ish for GBH Flamenco

https://backpack.tf/profiles/76561198254285639#!/compare/1534291200/1534377600

https://backpack.tf/profiles/76561198070775888#!/compare/1534291200/1534377600

#6

Sold for Circling Heart Cold snap cap + 10 key

https://backpack.tf/profiles/76561198070775888#!/compare/1534723200/1534809600

https://backpack.tf/profiles/76561198253093948#!/compare/1534723200/1534809600

http://prntscr.com/l11p50

Using this on the Cold Snap

#7

Bulk for Scorching Tossle Cap

https://backpack.tf/profiles/76561198166314775#!/compare/1536364800/1536451200

https://backpack.tf/profiles/76561198081706519#!/compare/1536364800/1536451200

#8

Untraceable, sold for some amount of keys

https://backpack.tf/profiles/76561198081270783#!/compare/1536796800/1536883200

https://backpack.tf/profiles/76561198119634686#!/compare/1536796800/1536883200

#9

Sold for Duped Anti-Freeze Festive Tree

https://backpack.tf/profiles/76561198114545227#!/compare/1532563200/1532649600

https://backpack.tf/profiles/76561198273615595#!/compare/1532563200/1532649600

I feel that the tree is gonna end up being over 100, and would be better to not use this sale without knowing the B/O.

#10

Sold with a couple keys in items for Circling Heart Flamenco

https://backpack.tf/profiles/76561198273615595#!/compare/1533600000/1533686400

https://backpack.tf/profiles/76561198114402400#!/compare/1533513600/1533600000

Sellers:

https://i.imgur.com/FUTOm6U.png

https://backpack.tf/item/2164987158 - 59 keys

https://backpack.tf/item/2253385450 - 65 keys

https://backpack.tf/item/2122938648 - 70 keys

https://i.imgur.com/Ni8lGAl.png - 59 key seller was originally listed at 66.

Sales at:

50

58

64 (2x)

65

68

70

https://i.imgur.com/BM6wC2T.png - buyers at 50+, excluding 50.

Going with 58-70. Median lies around the pure sales.