Hemmings, the World's Largest Car Collector Marketplace, is a great place to find information on buying a 1970 Dodge Charger RT. You can also search CarsForSale.com or ClassicCars.com. These sites list vehicles for sale by private owners or dealers.
On the Hemmings website, cars listed for free perusal are from the previous month. To access the most current listings, you need to subscribe to Hemmings Motor News, a monthly magazine of classic and collectible cars. CarsForSale.com and ClassicCars.com are free to search.
All three sites list the details of each car for sale, including mileage, miles per gallon and transmission type.