There were 2 faked screenshots in the OP from what I can tell, Islapdonkey & joosep. I'm not clear on whether or not AccountMaxSell was just an alt of Islapdonkey and this was all just a ploy to make it look like Islapdonkey is such a good guy that scammers are attacking him, but I have no reason to leave feedback for Islapdonkey at this point, nor would I really have any reason to trust him. So take this for what it's worth.
As for the others:
McCkane https://bitcointalksearch.org/user/mckane-205019
cryptojedi https://bitcointalksearch.org/user/cryptojedi-1076623
RacialSlur https://bitcointalksearch.org/user/racial-slur-1258371
amla https://bitcointalksearch.org/user/amla-1223970
alymwb https://bitcointalksearch.org/user/alymwb-1079889
alessyan https://bitcointalksearch.org/user/alessyan-731094
Emy leklap https://bitcointalksearch.org/user/emy-leklap-1060662
These were all certainly interested in buying a legendary account and these PMs I've confirmed do exist.
All systems gone, prepare for downcount!
5,4,3,1 off blast!!
Fly away in my space rocket.
You no need put money in my pocket.
The door is closed, I just lock it.
I PUT MY PORT PLUG IN YOUR SOCKET.
![Cheesy](https://bitcointalk.org/Smileys/default/cheesy.gif)
https://youtu.be/MNyG-xu-7SQ?t=39s