I love the 300zx, and would also recommend getting one. Buuuuut, there are a couple of things you gotta consider. Im guessing the mileage was pretty damn high, being thats its an 86 (I see a few now and then with low mileage, but not many). Since I'm assuming this is gonna be your daily driver (you said you currently had no car), you have to factor in practicality somewhat.
And you also have to be able to afford any repairs/maintenance down the line, which on a 300zx could get costly. Just remember no matter how excited you get about a car, you have to think practicality as well.
In addition, you have to remember that some of the people on this board have never had to drive in the conditions we face in the norhteast. Hell my integra is pretty much shit in the snow (Thank you 65-35 weight distribution), and FWD cars are supposed to be better in general. Also when buying an old car as a daily driver, you have to remember that winter's will absolutely RAPE the car.
My previous care before the 'teg was an '85 tercel wagon with less than 20000 original miles. Was reliable as hell...but it was quite a bitch in the winter to start up with carburetor and all. Id have to pop the hood and spray an assload of starter fluid just to get the thing going.