Buy a domain, put up a portfolio and some pricing info, toss up all your templates you've created. Browse existing designers' portfolios for more ideas. Orchid Designs does tremendous work, and you can check out my portfolios although they're nowhere near the quality of Orchid and others.
http://www.orchiddesigns.com
http://www.tgpfactory.com/
http://www.dynamixxx.com/