Did i get a good deal on this car? 1999 infiniti g20 touring?

1999 infiniti g20t with 68000 miles. i paid 3,800 for it. It has leather interior, sunroof, automatic. the ac needs freon though. and the airbag light is on because it had been in an accident but minor. the radiator had to be replaced. does the airbag cost a lot to fix?