Welcome to the hobby,

If you can, best thing to do is visit your local hobby shop. There are some planes that come pre-built with the radio and motor already installed. The Hobbico Super Star Select is about $300. It is a fantastic trainer plane. I Have taught several people to fly on this plane and it has proven itself to be a winner. Name brand equipment and a stable flyer.

The local shop will help you find a flying field too.

It is difficult to purchase used stuff unless you really know what your looking at and what to look for OR know the person your buying it from. You never know what is been though.

For you $300.00 bucks, invest in new equipment