First, we recommend the colon search of the domain.
In google search, simply type in site:domainname.com. If google brings back no results of the domain you searched, it’s a bad sign and possible that the domain has been penalized by Google even if there is website/content on that domain.
We also suggest searching the domain on archive.org to view the privies website that was on that domain and manually check and see if the content was span, auto generated or spammy content. If so, then you want to genome purchasing that domain.
Same goes to those who already have a website built on a domain but does not get indexed by google. And by having google webmasters tools created for the domain, you will get more answers to why your website is not being indexed by google or if you have any problems associated to your domain.
Hopefully this helps some of you who are looking for answers and if you have any questions, feel free to send us an email.