Cost is a factor of many things. Mainly how long you expect to take to complete the work and what your hourly rate is expected to be. Since you are not specifying where you are its impossible to say. Pricing varies so heavily on your location because the cost of living is so wildly different i different places, even within a country.
Even the clients themselves affect the price quite heavily. A bigger organisation would more likely pay more for a equivalent webpage. Mostly because they can affort do pay, though also because they usualy want guarantees, may work slower (more meetings), may want special legal terms etc. So cost is affected quite much also by the way the client expects to be treated, if they expect to micromanage and have lots of "free" revisions then the cost is higher.
All in all you can not often see the amount of money used from the webpage alone. Some things sich as arranging a photoshoot increase price. While comparable stock photos do not. I have seen lots of 10,000€ sites that do not appreciatedly differ from a 1000€ site.