If you observe the marketing emails of domaineering related service providers, you get an idea of the rates at which domain names are being bought and sold. It is a good indication of the value of domain names.
However, for an investor with limited resources, any purchase of domain name is a speculative investment which may turn out to be a dud investment if it cannot command premium in the market.
The world is big and there are varied interests. Hence there can be business potential in a variety of businesses and hence any good domain name which can be used for a prosperous business on the internet can command a premium. However investors must remember that the ultimate value for a domain name is determined only by a genuine user of the domain name and not the intermediary buyers who speculate.
Hence the “Intrinsic” worth of a domain name is what an investor needs to look at when he wants to invest in domain names unless he can speculate without minding losses.