If you are already selling online through Ebay or are even just considering starting then you would do well to research the market first. Knowing what to sell and when to sell will help you enormousely and this facility will enable you to keep ahead of the game.
There is a free demo at the site so you can see what is on offer so why not just click through and see if it is something that you think will help you achieve more sales online through the Ebay Marketplace.