A few bits of advice:
- Don't sell counterfeit goods because you will be caught and suspended.
- Don't make multiple identical listings because that's against the rules too.
- If you are selling items that are not in your possession, I'm pretty sure that's against the rules. I don't know if that's what "dropshipping" is, but it would be my guess, so don't do it. It's a great way to tick off buyers.