Nancy,
How much you spend will depend on how realistic you want it to work and the state laws where you are. Keep in mind that the cheaper "Pachinko" machines the wheels do not stop on their own, you have to press a button to stop each wheel. There are ways to correct this and also be able to use quarters or tokens. Again it all depends on local laws and where you buy it. I searched for 8 months before finding what I wanted. I do agree with John that the price range is $300-$1000. Good luck.