Otchu,
welcome to the sickness.
Before you buy, open up the coin door and use the buttons inside the door to navigate into the service menus. You can test all the coils, switches and lamps individually to see that they are all working. Make sure you have a good look at the DMD as well to make sure all the pixels are working.
As for transport, yes, you'll want to fold the head down. To do so on an LAH, you'll need the big hex wrench that should be with the game. Before moving, make sure to slide the glass off and remove all 6 balls. Once that's done, there's a latch at the back that holds the head to body. Undo that latch with the hex wrench, and then fold the head to the body (be sure to pad with cardboard or a towel). Once the head is folded, secure it to the body with a ratchet strap or some industrial plastic wrap. Prop the back up and unbolt the rear legs. Set it on its butt, then unbolt the front legs. Then you'll be good to move the pin around with a dolly.
Good luck!
Later,
EV