Sale 1:

Sold with shotgun skin (1) for Disco Beat Down Human Cannonball (46)

http://www.tf2outpost.com/trade/29294922 - B/O of 44

Seller: https://backpack.tf/profiles/76561198072934965#!/compare/1502236800/1502928000

Buyer: https://backpack.tf/profiles/76561198066617702#!/compare/1500681600/1501891200

X = 44 (Capped by B/O)

Sale 2:

Sold for Tesla Coil Lil’ Bitey (Suggestion at 42.5)

No B/Os on Outpost

Seller: https://backpack.tf/profiles/76561198125791160#!/compare/1499040000/1499126400

Buyer: https://backpack.tf/profiles/76561198072934965#!/compare/1499040000/1499126400

X = 43

Sale 3:

Sold for Aces High War Pig + 1 key + 1 ref

http://www.tf2outpost.com/trade/28848906 - B/O of 96

Seller: https://backpack.tf/profiles/76561198153922243#!/compare/1501459200/1501891200

Buyer: https://backpack.tf/profiles/76561198004517334#!/compare/1501459200/1501545600

Looks like a bit of an outlier. Excluding this sale.

Sale 4:

Sold with 8 keys for Spectral Swirl Flippin’ Awesome

Seller: https://backpack.tf/profiles/76561198103001146#!/compare/1498435200/1498521600

Buyer: https://backpack.tf/profiles/76561198125791160#!/compare/1498435200/1498521600

Should be used on the Flip.

Tesla Coil Lil’ Bitey: – Credit to Hell Killy

https://backpack.tf/suggestion/597de2e1cf6c751ee9587219

Sellers:

39 keys:

http://i.imgur.com/48X5Slc.png - 21 days

Sales at:

43

44

Aged seller at 39.

Going with 39-44.