How To Value A Domain Name
An extremely important consideration in the value of a domain name is the number of words it contains. Single “real word” domains (no misspellings or abbreviations), especially in easily monetizable internet industries, can be enormously valuable, particularly in the .com extension. Two word domains, again without misspellings or abbreviations, can also be quite valuable, as long as the domain name can easily be monetized, and the TLD is of high quality. Values really plunge when you get to three words or more.
Domains containing misspellings, abbreviations, hyphens, characters not on a standard keyboard, and other oddities often have very little value. Also, domains containing phrases that are trademarked may be worth nothing, as the trademark owner may be able to summarily confiscate the domain.
The extent to which a domain can be monetized has a major impact on its value. Domains in the sex, financial, and health industries often top the list in terms of high value sales. Domains related to industries that cannot easily generate revenue on the web will usually have little value.
Generic domains tend to be more valuable than non-generic ones. A generic domain is one that contains only real words (ones you can find in a dictionary), and has no contribution from proper names (first or last). Generic .com domain names in highly monetizable industries can be immensely valuable, and are for the most part very hard to obtain (without spending a lot of money!).
The number of letters in a domain name also affects its value. Three letter .com names can be quite valuable, even if they mean nothing. Four letter .com names usually need to be pronounceable to have value, but they need not necessarily be real words in the dictionary (cool sounding four letter .com names can be very brandable, even if they are made up). When you get to five letters or more, value is driven by quality of the word or words (generic vs. non-generic, monetizable vs. non- monetizable, etc.). Once you start getting over 8-9 letters, value tends to decrease a lot, unless the name is highly monetizable.
Ravi Shanker Murapakala 
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Thank You
Paul
zambeck@gmail.com