Responsive theme that is BuddyPress compatible
Price: $49
Lush is a premium theme that comes with a responsive design, full width slider, background and color options, event management post type and it is BuddyPress compatible.
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More portfolio themes: Business Premium WordPress Themes

Theme that is flexible and compatible with BuddyPress
Price: $49
Mint Theme features: Easy theme options panel, Typography choices with Google Fonts, ackground and color options, Event Management post type, and more.
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See some more great themes: Responsive WordPress Themes

A powerful multi-purpose WordPress theme
Price: $45
A theme with an unique homepage layout.  GamePortal supports BuddyPress which gives you a chance to build your own social network community.  Built into the theme, you are able to turn your website into an interactive one-stop-site for fans and visitors via many user groups, activity streams, discussion forums, private communications and friend connections.

The theme uses a filterable portfolio, four sidebar positions, four menus and many page templates.
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Beautiful minimalistic BuddyPress theme
Price: $45
This clean and crisp Buddies BuddyPress WordPress theme is WordPress 3.0+ Ready, Page Templates, Clean Coding, Custom Background Support, White Label Theme Options and more.
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Clean and robust community theme
Price: $50
Huddle is a community theme that is both elegant, clean, modern, and easy to use, with top notch features and functionality out of the box.  Features include: BuddyPress Compatibility, 6 Custom Page Templates, 9 Custom Widgets, Members Functionality, Full Blogging, User Profiles, and more.
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See more BuddyPress WordPress Themes