Search for a new domain name in addition to search (creation) of totally new name includes an option to buy an exiting domain. When we hear "domain for sale" most of the time we think about cheap domain and where is the best place to buy domain. Yes, often there are special promotions and price reductions for new domain name registrations. Search for domain extensions prices at different sites and compare them. But "domain for sale" could also mean premium domains for sale and even expired domain for sale. Premium domains are highly attractive for commercial use so their prices are high staring from several hundreds and going up and over thousands of dollars. And there are domains that have expired but still might have commercial value as they accumulated high domain authority over the time of their existence. Domain name itself is an important part of search engine optimization and might be a valuable asset.