If you wish for your account to remain anonymous, I would suggest you edit the information you have provided to be a bit more vague. I'm fairly certain I know the username based off of that information, and it took me about 5 minutes.
Well it took 5 minutes to be pointed in a different direction so it worked fine
I tried doing you a favor, only to be told I was wrong.
Let's go off the assumption that the information you provided about your account is not a lie.
There are 5 hero accounts registered during February 2012 that match the activity and post statistics that you provided. They are
wizkid057,
mezzomix,
Zubilica,
Isokivi, and
flatfly.
Right away, we can eliminate wizkid057, since he runs Eligius.
Flatfly is working on an ongoing project on the forums that he mentioned his active involvement in
less than two weeks ago. It does not make sense for him to sell his account.
3 to go
Mezzomix is definitely not inactive. In fact, he is online right now and posting. While I initially dismissed that account simply because he speaks mostly German, his English appears to be quite good, and he could have definitely made this thread. Regardless, he is very active, and a change in account ownership would be quite noticeable, since the new owner would be unlikely to speak German.
2 left
So, how do I know if you're Zubilica or Isokivi. Both accounts are inactive, Isokivi is even more inactive than Zubilica, so one might think that is evidence pointing to Isokivi.
There are three strong reasons that should convince any reasonable person you're Zubilica and not Isokivi.
1. Isokivi has a strong financial interest in retaining control over his account. His bitcointalk account is strongly tied to his ownership of his website
btctrinkets.com. Selling his account would give him a lot of liability, since a large percentage of his customers probably come from the reputation he has built on bitcointalk.
2. You're trying to make your account seem as appealing as possible to any potential buyer. That is why you gave the registration date, activity, and posts. Zubilica's activity is 784, barely over the 750+ advertisement, and his post count is 805, barely over the 800+ advertisement. Isokivi's post count and activity are well over these amounts, and they would have been advertised as such if this was your account. This reason alone should be enough to convince anyone that this is your account, but I decided to go through the process systematically just to prove you wrong.
3. Finally, Isokivi's last activity at this moment is October 17, 2014, 03:53:16 PM. Zubilica's is October 28, 2014, 06:54:21 AM. This thread was created one minute later at 06:55:16 AM. You clearly logged out of your main account onto your alt and posted this thread. Please try and dispute this.
In conclusion, you are a liar. You have either lied about your account's statistics, or lied about the identity of the account you are selling.