Here is my use of Virtuemart.
After a lot of hacks, the webiste finally came up!
http://www.terredebrume.com
The shop sells books (about 300 references) which are usually sold on Amazon.fr and Fnac.com
The graphic design has been made from an italian design studio (Personally, I wouldn't have designed it like that...) and the developing is mine. Finally, it's not perfect but I'm a bit proud of this.
Sorry for the non french-speaking readers, this web site is (for now) only in french.