When you get the results page, click on Completed Items(under the display heading) and sort the results by Highest-Priced. Ignore the listings that never received bids, those are failures. Scrutinize the most successful sales and see what the starting price and selling price were, at what price range the item was normally sold, in which category the item was listed, as well as find out how the sellers have described and promoted their items so that you can learn from them and apply it to your listings, but DO NOT copy and paste, make sure you write your own description, because buyers tend to look for a listing with an unique and different description.
Research is a challenging task, but it is definitely imperative. Not only a research helps you in setting an attractive price, it also gives you a better idea of which category suits your item more.
I always undersell the market and put my item in bold with pictures. This means a guy looking for "Item X" may see a list of 5 items there. But when mine is cheapest and is obvious: in bold with pictures, he will always go to mine.
I better jot that down, what a great tip! thanks buddy