Create a free user account on the site where you will be selling your ringtones. Myxer, Payloadz and Lulu are among the sites that allow you to sell your ringtones.
Create a Paypal account if you don't already have one. You will receive your payment via Paypal from the site that you choose to sell your ringtones.
Determine the sale price of your ringtones. The average price of ringtones generally ranges from 99 cents to $2.99.
Upload your audio files to the site of your choice. Follow the instructions provided, upload the audio files and set the prices.
Market your ringtones. Add links in your blogs, send messages to friends and fans, post links to your ringtones wherever you can. The better you market your ringtones, the more chances you have to make sales.