radon

I am planning to buy a '92 ES300 with 89K miles on it for $6000. The car has been well kept. I got it checked from the Toyota dealer, they did not find any problems with it. I was just wanted to know if the '92 model is know to give a lot of problems? I have a '90 mustang right now and it keeps requiring repair all the time. Don't want to buy another car that buggs me that much. Is 6000 is a good price for the car? Any help is appreciated. Thanks in advance.