I just Googled a few places where you can try to sell them: http://themeforest.net/ http://www.templamatic.com/ http://www.buystockdesign.com/ I believe you can also sell them on DP.
Do you have all your samples gathered into a portfolio? You would benefit from a blog or site that hosts your previous work, even if it was just work you did for yourself to build your portfolio.
Themeforest is one of the best, however, I believe that once you put your work on their, you lose the right to sell your designs elsewhere. Are you selling them with full exclusive rights (and they will never be re-sold), or just selling them as a template? Either way, I would love to have a sticky beak at the sites.
You'd make the most money selling it yourself using ads on Craigslist, oDesk, etc... Throw up a profile and when you get a client needing a website, sell him on your template. BUT, otherwise I've found TemplateMonster.com is a good option.
You could also try selling on various webmaster and Internet marketing forums. Most have somewhat of a marketplace section so you should be able to find a willing and able buyer there. Good luck!
clickbank dont support CL directly i have big team for working on any section to Craigslist. so if u need work on any section pls PM me sky : rashedkazi2