How much?

oh yes, another thread asking how much I should get for a website.
it’s just regular html, some css, some photografy, and it should be in swedish, english and german. It’s about 4-6 pages to write/language, and some more small popups with information…
The site doesn’t have much graphics, it’s just an informative site.

Is there some “rule” to follow to decide how much the site is worth?