On new accounts I always start with 1 auction let that sell all the way until I get positive feedback. Then I increase to 3 auctions into 5. Stay at 5 a week for about 3 months then increase to 10 a week depending on the item restriction and selling limit etc. This is for VERO items though worth $40-$100. For cell phone cases worth so little I doubt you would have any problems selling however many you want. It's eB though so you never know, I'd test the waters and just stay under 10 a week for the first 3 months no matter what I'm selling.
__________________ “You have to learn the rules of the game. And then you have to play better than anyone else.”
-Albert Einstein |