https://backpack.tf/item/2038199889

Sale 1:

https://backpack.tf/profiles/76561199132198012#!/compare/1619740800/1619827200

https://backpack.tf/profiles/76561199055386504#!/compare/1619654400/1619740800

Huh? (Untrace)

Sale 2:

https://backpack.tf/profiles/76561198869764279#!/compare/1620172800/1620432000

https://backpack.tf/profiles/76561199055386504#!/compare/1620172800/1620518400

Traded for a spelled Iso Flammer

Sale 3:

https://backpack.tf/profiles/76561198136556581#!/compare/1621123200/1621382400

https://backpack.tf/profiles/76561198869764279#!/compare/1621209600/1625270400

Doesn't show up in compares, but it seems to have sold for 131 keys?

Sale 4:

https://backpack.tf/profiles/76561198136556581#!/compare/1626134400/1626220800

https://backpack.tf/profiles/76561198054945991#!/compare/1626048000/1626220800

Swapped for Cloudy Moon Samur-Eye

Cloudy Moon Samur-Eye price in-date, at 182 keys

Whether or not this hat sold for 131 or not, it seems the sale is an outlier. Buyers at 131 too. Discarding

Taking 182 flat

Sale 4 seems to have also included a buncha misc stuff within the trade, not sure if that matter or not. The total for sweets are ~2 keys, so excluding it lest a mod says otherwise