Joomla Template Providers JoomlaSolutions.com
templateclub.mambosolutions.com/ offers a large selection of templates for download. Their template club has been running since 2004. They release a new template each month. They offer a wide variety of subscriptions:
- 1 week - $49.95
- 1 month - $50
- 3 months - $90
- 6 months - $160
- 12 months - $290
From what I could tell reading the site you are allowed to use the templates on an unlimited number of domains. All templates come with full source files.