Thanks to foamy for sugg

big drop...

RA warpig:

Sold with 2x darkblaze guad (2x 70) + dbd falkirk (~77) for scorching boa (585)

https://backpack.tf/profiles/76561198070474543#!/compare/1521763200/1521849600

Guads were in-date at the time of the sale; two new sales happened, both of which are bulky - 70 will work there

dbd kirk:

Sold for fetti mohawk ~53 + twatt slouch + 14 keys and negligible sweets

https://backpack.tf/profiles/76561198112433827#!/compare/1523664000/1523750400

https://backpack.tf/profiles/76561198326093863#!/compare/1523664000/1523750400

https://backpack.tf/profiles/76561198322246173#!/compare/1523664000/1523750400

https://backpack.tf/item/6486501718

https://backpack.tf/item/2906222043

https://backpack.tf/item/5501042058

Being resold for 77 by that same dude - matching buy order values on the slouch.

other sales I found are bulk aside from this one which'd end up below buyers if the cotton head were to be minied:

https://backpack.tf/profiles/76561198131137598#!/compare/1520899200/1520985600

585-70-70-77 = 368; can be rounded to 370

Sold with a lot of adds for a strange hellfire hunter

https://backpack.tf/profiles/76561198109997032#!/compare/1523404800/1523491200

Low outlier

Sold with spellbound exe for spellbound law

https://backpack.tf/profiles/76561198109997032#!/compare/1521936000/1522022400

High outlier

Further reasoning to exclude both trades:

The buyer from the high outlier sale resold it in the low outlier sale - he also advertized it lower than his purchase seems to reflect. The low outlier sale has some unminiable items so that can't be used either.