With only 66 days before Chirstmas and Black Friday closing in it might be a good idea to check out the links suggested by Grace. I know the post was from last year but if you click on the links you'll find that the info has been updated by eBay to reflect what's in demand for 2010!
Be read for the peak of shopping season by -
Knowing what you customers will look for
Preparing your checklist and making sure you didn't forget anything
And knowing your holiday shipping deadlines
Cheers :)