I am going to launch a responsive web site for a business. I have a good deal of experience with web development but since I want to focus more of my time on other aspects of this project I am trying to find a good template to use and customize.

I started looking into various responsive templates but there are a few things I need to know and was hoping you guys could help me out.

1. How do these templates work as far as licensing? I've seen some templates that charge a small amount $70, but then you could buy it for say $1000 (not the exact amount, just off the top of my head). How does buying the $70 template differ from the full-up version? Do they remove JS code or something that allows you to do more with the site.

2. What are some reputable sites for templates (responsive)?

Any other tips or advice would be appreciated.