GeoCities or AOL name domain is the cheapest way, but I want to see them, except in the specific search engine can. Some search engines that the domain address 'on' or 'free' free servers population will be ignored.
Even if your site recognized by search engines, professional domain name of your primary company name or think about using words might be more interested and reliable business is considered a potential customer.
Buy domain names, expensive, and cost about $ 100, many companies can register with your name, but when not in use are not provided by other companies.
One of the domain name to increase the number of search engine rankings based on keywords. For example, you may be more effective solderingirons.com irons.com electrical solder, make sure that the available domain names.