From Sedo:
"When you have listed your project for sale at Sedo, you will be sent an email containing the HTML code which must be incorporated into the source code of the content for the given website. This can be done through the program used to design the websiteâs content, or by providing the HTML code to the person responsible for the content of the website, such as the webmaster.
Sedo is unable to help you in this respect. If you need further technical assistance, please email etracker support. "