Based on my recent trades using this hat. (https://backpack.tf/item/530183210)

A snippet of my Trading log...

https://ibb.co/rMMq3yW

And for good measure because everyone's gonna say it didn't happen...

https://ibb.co/xDShfCq

https://ibb.co/1MsGv6r

I think this mini is good. However It appears you are citing instances where a user quick sold the hat.

For instance... 💀 sa1tz (impersonated) 💀 is a bot whom is always quickbuying...

I think there are defiantly instances where a person quick-sold the hat around 6.5 - 7 Keys

However, I think there are also instances where a person got the full value or close to it. Either in one for one trades or for pure.