I'd say that I can't decide whether or not I want to move to another country for a job without knowing what I'll be payed there, and what lifestyle that salary

I'd say that I can't decide whether or not I want to move to another country for a job without knowing what I'll be payed there, and what lifestyle that salary would buy me. Once I got the offer, I asked for one week to think about the offer itself. Would you say that's unreasonable?