I was doing the same as you selling quite a high volume on ebay and they suspended me for the same reason. I was emailing back and forth for a 5 months hitting my head my head against a brick wall of auto response messages.
Now I've designed my own site and started selling through that and using Google adwords to advertise. Much more profit and volume. I recommend you do the same. I've come to realise that Ebay is for mugs as they take most of the profits!! I suggest you do the same.