Yesterday, another copy of Red Sea Crossing turned up at Medium Bob's Curiosity Shop in Philadelphia. The boys at Medium Bob's have since recorded themselves playing the game, providing proof of its functionality, which is more than the owner of the original copy has done. The owner of the first copy has since postponed his auction and made offerings to the drama llama over on the AtariAge forums.
Medium Bob's is accepting offers on its copy of Red Sea Crossing, but doesn't yet have a plan for proceeding with the sale. It will post details on its Facebook page once it decides a course of action, but for now "the game is buried deep in a vault somewhere near the Earth's core."