Saw a posting on craigslist, and I am going over to play it on Thursday. I'm looking for advice on what to look for with the machine to decide if it's in good enough shape to be worth purchasing. I understand enough about what the cosmetic aspects should look like, so I am more looking for knowledge on things to check mechanically and whatnot. Thanks in advance pinsiders.

I wasn't asking if it's a great machine. At $300 I don't have a lot of options. I want to know what to look for in terms of mechanical condition.