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.
Your course of action really depends on how much work and effort you can put into the expired domain. If you're barely able to maintain and optimize your current site, you probably want to just 301 redirect the old site (note: see my amended comment above about the link value not likely to be passed). If, however, you're more creative and have some time on your hands, you can try your hand at crafting a microsite. If you really know your stuff and are experienced at making money off various websites, you'd probably do well with the third option.
Contains, Starts, Ends You can use the search bar to search for domains that contain particular keywords you are seeking, e.g. a search for "car" will yield results for all expired domain names that contain the term "car". You can also use the search tool to find domains that begin, or end with the search term too, with the drop down box next to the search form.
By using GoDaddy auctions section, you can also use keywords to search the domain names that you are interested in. For instance, if you type the keyword something like “fitness”, it will list you out all the domain names that matches with the keyword “Fitness” so you can easily make a list of all the domain names with your desired keyword selection.
Thousands of domain names expire every day. The reasons are different. Some owners forgot to renew the domains, some just don't want them anymore or they moved on to other projects. For most people these so called Expired Domains don't have any value. They just see a bunch of Domain Names someone else deleted and move on, but for the people who know about SEO or the value of good Backlinks, Expired Domain Names are money just waiting to get picked up from the street. The only problem is to separate the good ones from the bad ones. That is where ExpiredDomains.net comes into play.