You need a commercial web-store base on wordpress? anything you need to do is choice the theme from eleganttheme or wootheme and the paygate you would love to work with. The rest I will done for you..
You should provide me the logo and slogan or I can hire someone do it for 5$
example : http://www.teamupvn.com/
NOTE : i'm not design your logo and content, every product/page you should do it on your own.
