Not that simple as prices invariably rise over a year. A typical glow high wing trainer in 2019
Initially we have to factor in a 6 channel transmitter, a 6 channel receiver, a 4.8 volt battery pack, 4 analogue servos, a cheap 0.46 engine a high trainer ARF (part built)
Total around £350 to £400 For glow engine models we also need glow starter, a fuel hand pump and fuel. Approx £40
A popular starting alternative are EPP and EPO foam models. Virtually ready to fly requiring only a battery, transmitter and receiver. Models start at about £150. Lithium Polymer battery pack approx £30. Transmitters from £120, receivers from £35. You also have to factor in a dedicated special charger for the battery pack from £45.
In the end it does tend to balance out costwise but electric are quieter and quick to get flying. Or you may prefer the sound the of an IC engine!