A $500,000 aircraft is a single-engine aircraft with four seats that usually has a pilot and a flight instructor. The reason it has four seats is that you could put four people in there but no luggage, or you could put two people there, with full fuel, and do a lot of flight training.
The cost of general aviation aircraft goes upwards to over $1 million. That could be just for float planes or a smaller training aircraft. Then if you want to go into aircraft that are used more for business purposes, they're upwards of millions of dollars.
It's really anywhere from $500,000 to millions of dollars.