Hi Andy
Found the link to the one I sold for you to use as a comparison.
http://aussiepinball.com/index.php?topic=9975.msg129787#msg129787The fault turned out to be a wire that had come away for a solider joint and was fixed in 2 minutes before the sale. Was 100% with no faults.
My advice is if you really want it don't loose it over a couple of hundred dollars you'll be kicking yourself later on. Put it in perspective a meal out at a nice restaurant will cost you more.
Hope this helps.