A domain name that reaches expired status and is not renewed by the owner will be listed at an auction service (see FAQ for exception to this rule). The domain name does not immediately go into auction, but is immediately listed on the partnered auction service with an auction scheduled for the near future. Such a domain name will be exclusive to that specific auction service.
I wish I could tell you that expired domains are some sort of magic bullet solution to all your traffic problems and headaches. Unfortunately, if I were to say that to you, I would be lying. There are drawbacks. Just like with anything else in life, there are advantages and disadvantages. The problems with expired domains is that they are often hard to find on your own. You can take wild guesses and waste a lot of time, effort and energy, and end up with nothing. Also, if you were to try to scope out drop domains by trying to find them in the most common way, which is to use a drop domain exchange, expect to pay a lot of money. Why? Because of heavy competition. Keep in mind that you’re not the only person who knows that dropped domains can bring a lot of traffic to the table. There are many other online marketers out there that realize drop domains' traffic value.
We do not only have Expired Domains, but you can also find lists of Deleted Domains for a lot of TLDs. Deleted Domains or Dropped Domains are available for registration and can be picked up for just the normal regfee at your preferred domain registrar! All Domains have the typical SEO relevant data, like Number of Backlinks, Archive.org Birth Date and a lot more.