http://www.avondalequipment.com/
A site I'm working on for my employer. It's a restaurant equipment shop so buying online isn't really how it's done. But I like the Market theme's ability to showcase products and I get the feeling that when I leave my position it will be easy enough for someone with less familiarity with the web to keep the site updated.
I've created some custom variables which allow for sale pricing and a calculation which tells people how much they're saving over the list/regular price. The Support section helped with this.
As you can probably see, it's still a work in progress and I haven't really figured out how to make it look more like a "real" eCommerce site. Still working on it though.
Any thoughts would be much appreciated.