Does not have to be free, I'm just not a designer and loathe starting from scratch. Any suggestions would be appreciated.
Try this: http://www.freecsstemplates.org/.
Also check out this answer to a slightly different question.
http://stackoverflow.com/questions/495339/free-tools-to-speed-up-web-development/514741#514741
Layout Gala is a great site for building a basic layout and takes a lot of the hard work out of getting a stylesheet started. If you still want to add some of your own design elements then I highly recommend it.
CSS Vault and the CSS Zen Garden are some resources that I look to for inspiration. A lot of the sites recommended by others are great and you can find most of them listed at this eConsultants page.
I also like A List Apart, but this might require more effort than you're interested in giving :)
Good luck!
I really love the 960 Grid System - very easy to use, includes tutorials and demos, and works well cross-browser.
Try http://themeforest.net/, has some nice layouts. I purchased a couple of the Admin offerings for use CRM-style internal sites.
http://webhost.bridgew.edu/etribou/layouts/skidoo/ -- Contains some basic templates that are far from completion. http://www.glish.com/css/ contains some similar templates, but with different syntax.
Also, if none of the answers here help you, http://www.alvit.de/handbook/ has a ridiculous number of CSS-related links.
A resource I refer to quite often is the 40 CSS Layouts site. It gives you the groundwork of several different fixed, flexible, and liquid layouts.
Try Drupal, the Open Source Content Management System's themes. Most of the themes are very high quality and can be modified for other projects as easily as anything else.
Well I didn't like it too much until I figured out the IEClearing fix, but for what it's worth YAML (Yet Another Multi-Column Layout) yaml.de/en did a great job for my last website. I found it off another suggestion on stackoverflow
It's a bit off your question, but aside from using good resources (guides, blogs, etc.), when I see something I like - a nice style somewhere - I just go to the code and see how it's done.
Firebug's inspect mode helps in locating relevant code quickly.
Asaf.