ThemeShift is a German company that strives to produce professional-looking, well-coded themes for WordPress. There is not a lot that needs to be said about them except that their themes are, in fact, utterly goreous. And functional too. All ThemeShift themes are licensed for use on as many websites as you would like. Support is provided through their forum.
Premium WordPress theme sellers typically include support and upgrades with theme purchases. Visit ThemeShift's website for complete details including the most up-to-date pricing.
ThemeSorter is undergoing renovations. The current data is a little stale. While you wait for us, we recommend finding a new theme at...
Disclosure: We are an affiliate of these providers. If you click then buy, we receive commission.
By the way, if you ever need a premium plugin, try Pro Plugin Directory.