1. Up and running for at least 12 months; or making solid profits for at least 6 months.
2. The owner or decision-making body must list the site. Nothing is more disappointing than finding a great site for sale, bidding to buy, and finding out the owners really didn't want to sell...
3. Hosted with its own domain for at least the last 6 months. Geocities-type sites/hosting need to be moved to their own domains for at least six months before they are considered "established".
4. Unique site content. These may NOT be site copies. They may have been originally constructed from a template, but the content must be redeveloped and unique, and have an independent track record of success.