I have bought a domain by mistake freetotalcleanse.com, It's a PR 4 domain and it's still indexed by google, so I don't know why it was for sale, because it was an affiliate site,and affiliate don't sale good domains, and i want to know if this domain was flagged by google and for that reason it was on a sale, there for it's a bad domain.... Or is it a good domain that have been sold by mistake,there for it's a perfectly good domain, how can i know this?
If it's still listed then it's not banned by Google .. Most likely you either managed to grab a dropped domain (SELL IT QUICKLY!!!) or you were scammed and got a page with a fake PR.
the domain still showing PR4 and backlinks so its not banned. however you can analyze in webmaster tools
It it was banned/blacklisted it would NOT be showing as PR4. You can sign up for google's webmaster tools to see more info on their crawl results for that domain.