Go to mpire.com and register for the mpire researcher option (you'll have to provide an email address). Research the product you are interested in (using this tool)..it will tell you the keywords that people are searching for (the % usage of the words), starting and closing price of the product and best time to sell it. I've found it really useful when constructing descriptions on ebay. I've also found a product called sellathon.com very useful as well. You can also see what keywords people use to search for items in real time.
Good Luck!
