Ok this should be the one. Thanks again K1ng for further help. :D

Sale 1:

Sold with 50 pure + Big kill for Nebula universal translator

https://backpack.tf/profiles/76561198038666068#!/compare/1568160000/1568246400

Translator (137) - 59.1 (50 + Big kill(9.1)) = 77.9

Rounding to 78

Sale 2:

Sold for Sunbeams Napper's Respite(mini below for 48) + 40 Pure

https://backpack.tf/profiles/76561198148511293#!/compare/1567036800/1567296000

Total = 88

Napper's Mini:

Most sales are either untraceable or with dupes, but managed to find these 2 pure sales.

Sale 1:

https://backpack.tf/profiles/76561198305494036#!/compare/1566864000/1566950400

48 Pure

Sale2:

https://backpack.tf/profiles/76561198042803042#!/compare/1563148800/1563321600

60 pure?

Wont take this as there is currently a clean seller quite a bit below this, seems like a very high outlier.

Total = 48

Sale 3:

Bulk sale for a Double Spelled Head Warmer

https://backpack.tf/profiles/76561198100753690#!/compare/1568073600/1568160000

This sale wont be usable due to the spells.

FInally, there has been a Marketplace seller around 71 for a while:

https://marketplace.tf/items/tf2/377;5;u38

https://backpack.tf/item/1207040947

https://webcache.googleusercontent.com/search?q=cache:I__cR41AWzwJ:https://backpack.tf/stats/Unusual/Hottie%27s%2520Hoodie/Tradable/Craftable/38

Overall:

Sales at 78 & 88. Unsold at 71.

Rounding to 70-90 as K1ng has suggested.