well in my opinion, you dont need like flashy descriptions. what ebayers want is simple and concise description of what you're selling and lots of PICTURES.
for description, no need for the custom layout. just use the normal one. and for the pics, get as much as you can but don't use the ebay picture listing setup (the pics are scaled down, plus every pics costs you $0.05). upload your pics at imageshack or any other free pics hosting website and then link the pics to your listing. the pics are BIGGER (not scaled down) plus it's free. and lastly, add a Gallery pic to your search listing. hope this helps