What is the value of a quality domain name?
Things to take into consideration when putting a price on a quality dot com domain name.
The yearly fee to renew a dot com domain name is low. You can pay 10 years in advance for less than $100. Buying a quality domain name is no different from buying any other good asset. You need to maximize your profits for the number of years you own it, and then try to get the biggest possible price when you sell it.
With a quality dot com domain name you should try to turn your domain name into a brand, and should try to keep it to develop it for say 20 years. Smart owners will keep their quality domain names for longer than 20 years. The more you develop it and the longer you keep it and the more you should get for it when you sell it.
Some buyers are only interested to make a quick dollar and will flip the domain name after a short time. There is nothing wrong in taking money off the table, but to keep it and develop it and then sell it should bring in much bigger money.
The real big money is in keeping the domain name for as long as you can while building up a brand and business with it. It is hard to predict with accuracy how big will the Internet be in the future, but it is certain to be a lot bigger than it is today.
Keep this in mind when you make an offer. You should buy a quality dot com domain name for the medium to long term, so make an offer that makes sense.

