What is a "Roller" RC Car, or "Race-Roller"?

Http://Hpisavagex46.wordpress.com. Those of you who scour EBay and RC-Tech for 2nd hand RC bargains would have probably come across the terms "Roller" and "Race Roller". In the context of RC cars, what this means is that the kit comes without motor/engine, and electronics (esc, receiver, servos). Race rollers on the other hand are similarly without the "essentials" but are race-ready and have race-ready modifications to the car. On the used RC car market, rollers abound as many owners are not willing to part with their favorite engine or radio system. Some popular brand new "Rollers" out there- such as the Losi 8-ight, the Hot Bodies D8 Atsushi Hara Edition, and the pictured TQ SX10 SC. Rollers allow you to have maximum customization of vital parts and sometimes, cost savings too, as you get none of what you don't want or need