The DT member are the rightful person to paint his account red but you need to be reassure if the accusation is truth before doing that. However, I checked the guy account and I found out that Madam Lauda has already gave him red yesterday.
I have looked up the advertised URL on the forum and found it linked to the other accounts reported here.
The user has created a topic advertising his service in the Marketplace/Goods board as well as in the Marketplace/Auction board, and Marketplace/Digital Goods/Invites & Account sections.
All topics were locked, preventing anyone from posting. There was nothing beside the OP with the advertisement.
These are the sole contributions from that user to the forum.
User account is linked to other accounts that have already scammed people in the past.
In the end, he scams people willing to purchase accounts. I do not encourage account trading, but scamming is wrong.
The rest is a simple "connect the dots" game.