I have couple questions:

1. Why is the real reason for you to sell this account? Are you not gonna bet anymore ever? You might regret selling it later.

2. Even if you are totally pristine and ownership of the account will be transferred with no problem.
There is like ZERO guarantee that Nitrogen will leave it alone if they found that for example IP changed. Then what?

3. I would consider that offer valid if you could lend this account for someone to test for extended period of time. But it is impossible, isn't it?