Yeah - the ebay stuff needs to be pretty boring and exactly as they will receive it. You can "dress it up" with lighting and props, but it cannot be "touched up" after you shoot it.

As far as blowing out highlights - depending on the mood you're going for, feel free to blow out a couple of bits here and there. Don't go overboard with it, but don't be afraid of it either. The thought of not blowing the hghlights out is mostly for catalogs like Sears and the JC Penney, but many commercial retailers kinda like it (again, sparingly) if it gives any form of sparkle.
-Lew ;-)