I wanna get my first 3000gt

I want to buy my first 3000gt on Facebook marketplace place since that’s the only way I can ever find them I’ve seen videos about then and some of the issues that may come with but I want experience from people that bought it form Facebook had them for a long time. So I want to know what to watch out for when I’m looking at the car what part breaks down the most videos on how to maintain the car how not to get scam when buying from a person. I want to know lot before I get into since this is a car I admire a lot