First, use the word 'premium' carefully. If you hand regged these domains any time within the last many years, they aren't premium. If you bought them cheaply at godaddy or sedo auctions etc, they aren't premium because other domainers will pay a high price to win premium domain auctions. Premium refers to a solid dictionary word or a multiple-worder, in dot.com, that is in common every day use. It also refers to ultra-fantastic words, in other extensions.
If your word is a true premium, estibot will appraise it in the tens or hundreds of thousands. Of course, as others above said, you can't go by automated appraisals; just saying, an auto appraisal will see strong enough metrics in a premium domain (with exceptions being very premium brandables, for example some fantastic LLLL that isn't a word) to give it a super high appraisal. Automated appraisals will give a 250 - 1500 appraisal easily to any old domain you hand reg.
As far as hiring a domain broker, they won't be interested unless your domains are clearly sellable to obvious end users. If they are inventive domains where you have to figure out how to sell them and how to interest a buyer, a broker won't touch them.
Brokers work on commission, so they need to work with domains that have clear value, clear sellability. Most brokers will not put hours or days of work into trying to sell your domain for $500, since they'll only get a small commission off that sale.
To find out what your domains may be worth, put 2 or 3 of them up in our appraisal section to see what we think of them. Then we can give you better tips on how to sell them. Until we know the quality of your names, we just can't advise. Because there are a lot of domainers who reg the worst names, names that will never sell and never be used, and hype them as 'premium'. We need to see what you got.
Good luck, welcome to the forum
