Even if its price exceeds a thousand dollars, I do not advise you to sell your Bitcointalk account, because your account is old, its rank is good, and you can participate in signature campaigns and reap more than the funds that you would have received when you sold the account. The price of the Bitcointalk account depends on the quality of its posts and activities and on its trust, and there are many factors, and I believe that if you sold your old account and created a new account, you will not be able to get your rank, as it was in your old account for a short time, it may take many years, because of the new Merit system, as it is a system that allows members with valuable topics and posts only to get a specific number of Merits from other members then they get a new rank.