The Kadet Senior is an excellent trainer.

I have one with a Magnum .91 4-stroke in it. Which .40 OS engine does it have? You ar looking at 210$ for the ARF new and around 80$ for the engine new (depending on which one) 50$ for servos and another 50-80 for the RX. (new, that is).

If it comes with a 4-6 channel computer radio, grab it!! (heck, it's a good deal either way as long as it's in good condition).