Re: 1988 Roots Beer??
Look for a picture of the neck plate at first to make sure its falls in the 1988 category and authentic JEM plate. Find a picture of an authentic RB and make comparisons of how everything lines up. Volume knob position, monkey grip position, headstock decal position, pickup fading in some cases, etc
As for dealing with overseas, I have no experience with that, other than to make sure you give payment through paypal or some other method that allows for dealing with fraud.
Price sounds great.