This thread has got a lot of legs to it over 50 posts. Here is my take, first we are all operating in the dark here, you have every right not to post it but we don't know the domain we are talking about.
It is one thing if you are getting $10 for a pronounceable CVCV.com or a great two word .com. If it is a very long tail name that happens to touch upon his industry it might not be worth much.
Every domainer without knowing the human being they are talking about has to throw out the CEO or RICH spiel. That does not matter, I personally know people worth a lot of money that feel domaining is the dirtiest business online. You are going to run into people like that, every one holds different businesses and professions in a different light.
There are plenty of people out there, wealth or stature aside, that feel domain names should be $10, that anyone paying more is a sucker.
Plus when a name is not truly a quality name, it is easy to find $10 alternatives. I own names that are for me, for ideas or projects, they hold no great resale value, when I get an offer I know the person is not going to offer much, certainly not anything worthwhile so no need to get pumped up about a possible sale.
I own the name Bazinga.TV, I did not pick it up to sell, I like the The Big Bang Theory and Bazinga is taken in so many extensions, when it dropped I picked it up.
I got an offer from a French company, easy to research, they had a section on their site titled "Bazinga" So I reply back to the offer to see where they are, I don't price names outrageously, and these guys were like "Oh wow, I mean we could possibly struggle to pay you $200, but that is a real stretch" They wanted the name for reg fee, I told them I really didn't want to sell unless it was going to be something worthwhile.
I get fans of the TV show make offers all the time, they are from $10 to $25. I don't get upset by that I know that a fan is not going to pay $3,000 for the domain.
This person is either screwing with you and yes some people love to do that, or they are someone that feels all domains should cost $10 to $20. I would just move on, you said you are new, wait til you get better domains and you get 20 emails a week offering you $100 for a CVCV.com. Good luck.