I still stand that average renting price in Moscow for a decent 3-rooms flat would be no less than $1700 a month. A friend of mine inherited 2-rooms flat in Kuzminki from his grandmother (it's an ordinary flat in a panel house buit in early 80s) and he leases it for 50 000 roubles (about $ 1600) a month. He says there isn't a problem at all to find a customer for such a price.