For a good one for your budget best route would be seccond hand i reckon and then you want to be looking at the spektrum ones if you want to go new route you won't get so many bells and whistles but you should be able to pick up a good 2.4ghz system with frequency hopping system built in for £32.99
By bells an whistles i mean things like model memory exp, nice lcd display for battery level, abs thats about all you will use mostly your looking at around £75+ and then on the pro ones you get telemetry which monitors temperature, revs etc they are around the £160 mark so get quite pricey and prices can go into the hundreds.