The Sale:

Sold for $115.51 on the SCM

https://backpack.tf/item/5238559500

http://steamcommunity.com/market/listings/440/Unusual%20Wraith%20Wrap

Buyer: https://backpack.tf/profiles/76561198023424492#!/compare/1496361600/1505088000

https://backpack.tf/profiles/76561198023424492?time=1505606400 – Untradeable on the 17th of September

https://backpack.tf/profiles/76561198023424492?time=1505692800 – Tradable on the 18th of September

The sale had to have occurred 7 days prior to this. There are no other sales at around this point on the item. Therefore, there’s no mistaking this sale for any other.

Keys were 2.49 at the time.

115.51/2.49 = ~46.4

X = 46

Sellers:

https://i.imgur.com/gvDh6cE.jpg?1 - $132.25 on the SCM (Roughly 53 keys)

Sales at:

46

The sale here is the only one in the last 3 months, and it occurred 2 months ago. Therefore, should be fine to set a range with a single sale.

Going with 46 flat.