What is the best digital camera?in the world & in iran.with a price about 250000 tomans.?

I recommend the new digital kodak instamatic.

you need to be more specific with your question, there is not "best" camera in the world. It depends on your preference, are you a casual shooter, or more interested in learning about photography, do you want a small camera or a big camera, etc

what is 250000 tomans?
cause u can get one from wal-mart
for about 16 0r 17 american dollars