Can anyone explain this?

This was from: https://steamcommunity.com/market/listings/321360/Rare%20Cerato%20Holiday%20Ear%20Muffs

I was recently browsing the market on a niche game, called Primal Carnage: Extinction, that I used to play on and off for years until the last year. I saw that this item had a steam history which, if it were to be believed, stated that almost $650,000 of Rare Cerato Holiday Ear Muffs were sold in a single day, and the amount sold is really suspicious considering the monetary amount and the sheer mass of items sold when the current amount of that item on sale only totals 178.

On top of this, many other items also had thousands sold in one day, with those also being suspicious in my eyes since I doubt that so many items were in circulation to begin with, though their price amounts were at only $0.03, which is also very confusing.

What could possibly be happening here?