There are quite a few listings that show in the New & Popular Auctions sections that do not have an image with them. I think this has a couple of effects:
Firstly it does not look good, the idea of these should be to promote sales and the site and I think both would be better if they all had images.
For promoting sales, many people will not bother with listings without an image, if they all had an image it could lead to more sales across the site.