Nitro RCs are now a joke, no one buys them and they are worthless on the used RC market.
Electric is the only way to go and make sure it's brushless or you're wasting money. Buy Jason's RC, it's a great deal for the money. You should buy an RC used not new. Getting a lipo charger, with lipo and an RC for $200 is cheap, most chargers are $50+.