Infinit j30. looking for my first car. is it worth the dough. hard to maintain? expensive? need answers!?

No problem getting parts for the engine (the VG30DE, also used in the contemporary Nissan Z), but other stuff may be problematic. The downside of the J was that it weighed over 3500 lb yet had no more room than your average Sentra. If you can live with that, you can make this work.