Finally! I ended a year and a half long search for an ICB tonight! Found it on Craigslist, and drove 6-hrs round-trip to retrieve. Currently non-working, but it is complete and in a respectable condition. I have visions of grandeur for it.
If you don't mind, please let me know of any must-do bulletproofing you guys would recommend. The belts are as hard as pencils and fall apart when you touch them, so that is an obvious starting point. I also was going to pull the boards and replace any electrolitic caps, and the memory battery, before powering it on.
Lastly, and in the interest of providing an additional data point on the current pricing/market of these games... I gave $1750 for this one (5/1/2018), and don't regret it (yet, at least!).