I did a check on sootle.com and it shows that it has no value, zilch, $0.00. Since you have never used it the search engines, let alone people, are not aware of it. A website has to be in use to gain in value. I would suggest you either develop it to sell networking cables or offer advice on good cable services. Better yet, monetize it (with other than the Google Adsense ads you have) by getting persons who deal with cable (in any form) to advertize on your site.
If you are still intent on selling it, try selling it to someone who has a business that deals with cables, or to anyone that makes an offer you think is fair. The choice is yours.