Sometimes when you search for a domain name you could see that some of them are more expensive than usual. Most likely you have found a premium domain. This name either already owned by someone and put on sale or register believe that particularly this domain should be sold for a higher price. There are many reasons why. Usually these are short, easy to remember names, often directly connected with service or product category, aria or city, profession. The price for already owned domain might go up to thousands of dollars, while new names will be three four times more than ordinary name with the same extension.
Does it worth to get a premium domain name? While for sure price matter, in sort, yes most of them worth it. Premium names even might become a valuable asset for use or future sale. It might consider as an investment to register domain that might become popular, and then sell them in the aftermarket at auction. And now could be a good time, the demand for premium domains is going up.