Below are a few ideas for how you can post free ads on craigslist.com and other classified sites.  These are the #1 and #2 classified ad sites available. There are literally hundreds of classified sites out there where you can post ads.  It is important to read each site's rules and guidelines on how to post and how often you can/should post. Most have it where your ad will expire after a certain time, however, you can usually repost the same ad with a simple click. Most sites will email you when your ad expires.  When you register, post and repost your ads, you'll need to check your email because each site may have different guidelines on how the ad goes live.  

You are welcome to use any of the artwork and text you want, from the examples below, on your ads. However, the more creative you are, the better. Each separate ad you place for the same product should have different text for better search engine optimization (SEO) for your ad reach. It is important to NEVER just use a picture because the text on pictures can not be picked up by search engines - be sure to always have both text and pictures to illustrate your point, even if the text says exactly what is shown on the picture.