There's no set-prices for domain names - A domain name is only worth what somebody is willing to pay for it.
The same could be said of houses.
Like any established market, there are clear price ranges for different types of domains. We have a decade of detailed sales records (at places like dnjoural, sedo, namejet, etc) to draw on, plus our own experience. EveryBit.com just happens to be well outside my own domain name investment niche.