There was a similar situation with a NIB Black Knight about 10 years ago in Canada. The new owner unpacked it, the batteries did not leak (lucky indeed) and BK booted OK after 22 years in the botx. I downloaded the photos from the web and stored somewhere. It was not disclosed what price the NIB BK sold for.
http://www.flippers.com/nib_bk.htmlDon't know if it came from the old Time Travel Warehouse or not.