I found out yesterday that my ebay account was locked, and the reason given was that my account was accessed by someone else. So I went through the live help chat twice, spent about 1 hour, and finally got my account restored yesterday afternoon.
Today when I signed in again, guess what, my account was supended again with the same reason! I know that was unlikely as I changed my password to a very strong one, and when I checked the details in my account everything was the same as I left it yesterday.
It finally dawned on me that the auto-detection system implemented by ebay could have been triggered because I accessed my account from China (my account was registered in the US and I use it from US most of the time).
Sigh...now waiting in line to get connected to the next available live help agent...