My best advice is when creating threads and posts on this site, is to use as little detail as possible, while still giving enough to advertise.
I don't know anything about Tera, however, I will reference from a WoW standpoint. Never show the actual armory (Website link of your character) on the site, and never mention the characters name. Offer to give more information to those interested, who message you on the website or via a messenger service. If Tera supports an "Anonymous Armory" of sorts, I'd recommend using that.
It's a very common mistake for people, particularly those new to buying/trading/selling accounts, to give too much information that is visible to the public, which can easily be viewed by people working for the game companies. And most of these companies have a "Ban first, ask later" policy.