You will experience many highs and lows as an Ebay seller. Enjoy your success and have fun but do not get discouraged with problems.Take care of them quickly and move on. I have had the thrill of selling an Item that I paid $6 for $250! I have also had someone return a $500 item at a great loss in shipping fees and condition of the item. Be careful to avoid mistakes and have understanding when someone has a problem with their purchase. You will make mistakes and learn from them. I learned very early on not to be sloppy or cheap with packaging and to always understate an item's condition. Even with your best efforts you will sometimes come across a buyer who just cannot be made happy or someone who you think is unreasonable and plain stupid. Learn to control your emotions , take a deep breath , act professionally and go the extra mile. While there will be people that take advantage of your service policies your reputation will far outweigh any loss of money. Good reputation creates more business.
You will discover that the more time you invest, the more money you can make. Be careful to not go too far with your ambition. Save time for your family , remember to have fun. You can strive and work yourself to death but it is God who distributes his blessing to whoever he chooses. Be content with whatever profit you bring in and don't let it go to your head. The higher you let yourself fly the harder the crash is when a problem comes. May you be prospered in this new year with your Ebay business!