Can I use a wordpress.com theme on a wordpress.org site?
I currently have my site hosted in wordpress.org, but I want a theme that is on sale only on wordpress.com. Any way to get this done?
No you can’t. WordPress.COM and WordPress.ORG are completely separate and have different logins, features, run different versions of some themes with the same names, and have separate support forums. http://en.support.wordpress.com/com-vs-org/
The premium themes sold here at WordPress.COM are licensed and adapted for use only on WordPress.COM hosted sites and no others. To purchase a version for WordPress.ORG contact the theme designer directly.