Being a former renter myself in the Crestwood area, I can say that generally, depending on size, condition, etc, you can expect to find rentals in the Crestwood area anywhere from $900 to $1200. Some 2 BR bungalows will rent slightly below that if the owner wants a quit rental.
Unfortunately for renters, the rental demand is quite high right now due to the ongoing housing market crisis which has driven rental rates up some. A great place to find rentals in the Crestwood area is Craigslist as well. A lot of owners and management companies use Craigslist because it's free advertising and is becoming more and more relevant than newspaper classifieds.