These are great cars but make sure to get it checked out and make sure you understand what you're getting into.
Looks like other people have pointed out the salient points. Not an unreliable car, but just expensive when things go wrong or need replacing. Also a lot of little stuff tends to break or isn't quite right, trim, bushings, electric items. All of it can be fixed... for a price. Also, as someone else mentioned, count on a rebuild if it hasn't been done.
People talk about how these cars hold their value and what not, but I'm not sure I agree because it's easy to drop a couple thousand a year into them if you're driving the thing and then you go to sell it and maybe it's worth what you paid for it or a few k more but you also put a bunch of money into it. Obviously it's a much better investment than buying a new car, but don't think you're going to buy it, put miles on it, put money into and then get it all back and then some.