Sale 1:

Sold for Logo Le Party Phantom + DBD Hat of Cards + Tesla Coil Cranial Carcharodon (14)

http://webcache.googleusercontent.com/search?q=cache:czVq1-xuaPAJ:www.tf2outpost.com/trade/29309392+&cd=1&hl=en&ct=clnk&gl=au – B/O of 59

Seller: https://backpack.tf/profiles/76561198009458322#!/compare/1502064000/1502150400

Buyer: https://backpack.tf/profiles/76561198233331152#!/compare/1502064000/1502150400

This will easily cap.

X = 59 (Capped by B/O)

Sale 2:

Sold for $99 on Marketplace.tf

https://marketplace.tf/items/314;5;u13

https://backpack.tf/item/261554432

99/2.05 = ~48.3

X = 48

Sale 3:

Bulk for stuff

Seller: https://backpack.tf/profiles/76561198187599807#!/compare/1503100800/1503187200

Buyer: https://backpack.tf/profiles/76561198061119329#!/compare/1503100800/1503187200

Sale 4:

Bulk for Burning Modest

Seller: https://backpack.tf/profiles/76561198233331152#!/compare/1505433600/1505606400

Buyer: https://backpack.tf/profiles/76561198061376237#!/compare/1505433600/1505606400

Sellers:

51 keys

https://i.imgur.com/9vAdX33.png - young, most likely re-listed:

https://backpack.tf/item/204000406

52 keys:

https://i.imgur.com/vEC1LFh.png - re-lists often

https://backpack.tf/item/391628619 - owned for more than a year

55 keys:

https://i.imgur.com/aK52D2G.png - 2 months

65 keys:

https://i.imgur.com/Uo5oJcb.png - 7 days

75 keys:

https://i.imgur.com/h5z1jne.png - 6 months

Sales at:

48

59

Excluding 59 due to the aged sellers for cheaper.

Going with 48 flat.