What do I do if someone posted on my ebay account and now I owe money?

[Adrian]

Its pretty straightforward,
You are responsible for the actions, you have to pay the money back to ebay to keep your account good.
You have to find some way of dealing with your brother, he now owes you the money, whether you get it back or not depends on him.
This is serious because not only did he use your PW which is wrong but he also committed fraud, three counts in fact because he did it in your name which is fraud, sold an empty box which is fraud, and broke into your account.
I really dont know how do deal with the brother but if nothing else you learned 2 valuable lessons.
Dont leave passwords on a computer that other people use, and,
Your brother cant be trusted and has absolutely no respect for you or the damage he does to your reputation.
How did he get the money? Why didnt it go to your usual Ebay bank account?