We also have other letter templates for other purposes, such as marketing letter templates to help you advertise your product or service. (template.net)
You will learn about writing marketing letters that get results, getting interviewed in newspapers and on TV and radio, how to write articles about your books topic that get published in magazines. (nonfictionwritersconference.com)
So overall, not too bad of results for first mailing with a self - made marketing letter. (biggerpockets.com)