You yourself make Ads of all the stuff you sell on Ebay. So if you want to sell more stuff you need to make your pages attractive which easily can be done by simple HTML tags. Moreover customers comfort should also be kept in mind so that he comes back to you for his purchase.
Ebay is the best site to sell on Ebay. You should have a paypal account as well, it's the most commonly used method of payment on Ebay, and many other internet shopping/selling sites.
Around holidays when demand for items is the strongest. Also time your auction to end during a weekend afternoon if you can, when most people are hunting for items.
