[Plugin: DukaPress] SinShop Theme (Free)

Features;
You can add product regular posts tab,
Product Video Review (Custom Field)
Basic Product Features (Taxonomy)
Product Detail Features (Regular Posts Place)
Category Based Search
demo: http://sinanisler.com/demo/sinshop/
download: http://www.sinanisler.com/blog/wp-content/plugins/download-monitor/download.php?id=22
some parts turkish but not much you can translate theme your language

enjoy !

if you need premium theme contact me : sinan at sinanisler.com

Source Read if you need there is much more detail: http://www.sinanisler.com/blog/sinshop-wordpress-e-ticaret-temasi/

http://wordpress.org/extend/plugins/dukapress/