I have only had one nitro RTR and all the rest have been kits. Now I will have to admit I buy quite a few RTR Kyosho Mini-Z F1, as that is the only way you can by them. They are 1/28 scale electric great fun when the weather is bad out side. There are some brands I will not by because they only make RTR as far as 1/10 and 1/8 scale. Kits are the only way to go.