There are lots of economic indicators you can use to determine if the local neighborhood pricing is more or less expensive than someplace down the road.
One common thing to compare is the BIG MAC INDEX, as the McDonald’s Big Mac is a fairly standard product that is sold around the world. A Big Mac in Norway is going to be more expensive than a Big Mac in India. Then again, the Big Mac in India is made from chicken instead of beef.. which may be part of the cost savings there.