I don't think you're going to get a helpful answer at all unless you post the location where you will be looking. I've lived all over. When I was an undergrad, I rented a very nice two bedroom apartment with a friend for $750 (total, $375 pp) month in a small town. I lived next in a major city where it was $1300 for a shoe-boxed size studio apartment.

1 bedroom flats can easily be $2500 a month in places like New York city or London or $300 in rural towns. Location, not size, is really what defines real-estate prices.