Everyone tries to help newcomers with understanding what makes a domain valuable to start with. But after a while, it gets on your nerves, specially the two or three persistent guys who insist on using you as a their personal ‘free domain name appraisal‘ system.
I’m happy to help once in a while but please don’t make it a habit. I’d rather use my time to sell my domains instead of helping you buy from other people, its nothing personal, just business. And we all have only 24 hours in a day, contrary to popular belief. 😉
If you’re casually asking, use a free community domain appraisal, might not get you the results you’re looking for but at least it will get you an overview of what people think of your domain. There are even some excellent auto domain appraisal systems, reading the output from them of course needs a modicum of understanding.
If you really need an exclusive appraisal for each domain, consider paying for it, there are more than a few available services:
There are tremendous resources and guides online and if one really wants to learn, a couple of months of reading will help them identify what is and what isn’t valuable. Though at the end of the day, domain value is really totally subjective to the buyer.