I live in the US, so there are all sorts of tools that are available for analyzing things like salaries including variations between different areas of the US. For example, Salary.com and Monster.com have information for comparing two locations against each other (Monster.com actually does a better job because it not only presents salaries but other information like cost-of-living, crime rates, population distribution and some other things as well).

That being said, it is hard to say what is a good salary for you, if you are looking for an objective estimate you should look for a web site were someone has done a real analysis of salaries for Eastern Europe. Anything else is totally subjetive and basically worthless.