If you read the whole ad posted on eBay you will see that they believe the bidders are running up the price on purpose and do not intend to pay. (Possibly bored kids who are trying to get back at the father for whatever reason)
So, the reality is that they will most likely NOT get $9k+ for the game but will end up keeping the game and giving to his kid anyway.
Morale of the story, RTFA.