I found a keyword domain but its like this "D-O-M-A-I-N.NET". (Just an example) All other domains with that word is sold but not this one. .com, org, biz, co.uk, de, us, info, in, at & bz... All registered. This word gets over 800k unique searches each month. Shall i buy or skip?
Generally, domains with one hyphen might be worth something, if they generic. For instance, drum-lessons.com might have value. Something like D-O-M-A-I-N.com might have value as some kind of freak novelty domain. Generally speaking though, domains with more then one hyphen (unless they rank for some key-phrase) don't have much value. Some exceptions might be something like Life-Insurance-Policy.com or something.
It would be greate to forget it because people usually will click on Domain.net compare D-O-M-A-I-N.NET. The hyphen show spammy and unprofessional of the site and usually a official site will not do that.