Here's what you can and cannot do with the themes available from PLRThemes.com:

 

[YES] Can be given away
[YES] Can be packaged with other products
[YES] Can be edited completely and your name put on it
[YES] Can be added to free membership sites
[YES] Can be added to paid membership sites 
[YES] Can sell Resale Rights 
[YES] Can sell Master Resale Rights 
[NO] Can sell PLR rights