Purchasing domains these days is definitely more than just having an online presence. It is in fact, no less than the real estate business. Just as a piece of land or a house you can purchase and sell IP numbers (domain names) online. Be the first one to guess the value of a domain name, register it and you will be sitting on a gold mine a few months/years later.
But nowadays, to purchase a domain you have to check not only at the domain registrars but also at various domain sellers and re-sellers (in case the domain of your choice has already been registered by someone else) - making the whole work a lot more tedious for you. But luckily, now PCNames is there to make the process simple and easy.
The FAQ section of PCNames has got all the basic information about Domain names (right from "what a domain name is?" to "what is domain squatting?" etc.). Moreover they also provide some extremely useful Tips for both the newbie & experienced domain buyers (and sellers).
Any domain name search at PCNames shows the results for various different TLDs highlighted in Green (Available), Red (Not Available) and Blue (Registered but Available for Sale). All your recent domain-searches are shown in a tabular form and from that list you can buy the domain(s) of your choice from any of the listed domain registrars (GoDaddy, Yahoo or Network Solutions (NS is NOT recommended by me)). Once you click on any of the registrars you will be redirected to their website, where you can complete the transaction.
If you are an experienced domain reseller, then you may also try their Bulk Domain checking tool and if you are new to this, then try their Domain Generator tool for some quick (but limited) suggestions.