Alright, lets try this again.

Wasn't planning to sell but got a nice offer so going to update this with a range, also taking note of histories that K1ng gave me for the Wraith Wrap, thanks :D.

Sale 1:

https://backpack.tf/profiles/76561198038666068#!/compare/1566864000/1566950400

https://backpack.tf/profiles/76561198125791160#!/compare/1566864000/1566950400

Bought for 38 Pure + Aces Wraith Wrap(Mini below for 9)

Sale 2:

https://backpack.tf/profiles/76561198080283342#!/compare/1566950400/1567123200

https://backpack.tf/profiles/76561198038666068#!/compare/1567036800/1567123200

https://imgur.com/a/sRVZXob

Sold for 55 Pure

Histories aren't much help here, BlueSpider bought some of the keys off of Marketplace just before trading with me, and I used the keys towards a Pyromancer's moments after, so I have a screenshot included of trade history.

Mini for Wraith Wrap:

This was hard as most sales are untraceable, being sold rapidly 3 or 4 times in a few hours.

Sales i found:

https://backpack.tf/profiles/76561198080075371#!/compare/1566432000/1566604800

Sold alongside Eerie Salty Dog for a Cloudy ketche

https://backpack.tf/profiles/76561198126424975#!/compare/1564704000/1565481600

Looks like a 1:1 for a Kill-a-Watt Strontium Pipe

https://backpack.tf/profiles/76561198093164511#!/compare/1566000000/1566432000

9 Pure

The first sale has a couple very outdated prices so seems difficult to use, might be better used on one of those.

The second sale seems to be a 1:1, not sure. Strontium is outdated but priced at 9, considering quickbuyers for the Wraith Wrap are at least 8, can't really drop Wraith Wrap if the Strontium is a lot lower.

That leaves sale 3, at 9 pure, so taking the Wraith Wrap as 9.

Overall:

Sale 1 = 47

Sale 2 = 55

Do comment if I got anything wrong.