People can find free samples of sales letters at WriteExpress.com and Letters.org, as of 2015. WriteExpress.com offers multiple samples of different types of letters, while Letters.org provides single samples of letters along with tips related to the importance of each type of letter.
WriteExpress.com offers sample letters in both English and Spanish, and it offers links to related articles and resources. It provides free samples around topics such as sales contest announcements, follow-up after a sales presentation, thank-you notes following sales and product or service introductions.
Letters.org offers free samples of quote follow-ups, letters to current clients and sales pitches, and it explains why each type of letter is necessary in a business environment.