I understand the temptation when a name like this presents itself. I am a newbie, I have been a self employed business man for 22 years. Here is my opinion if your still wanting one.
It's not going to earn much typo traffic in parking, unless every Google user suddenly has a seizure.
If you were to develop it, as soon as your income put you on Google's radar you would be toast. As you know, they must vigorously defend the Google trademark in order to keep it's standing. Companies the size of Google have over spillings of vigor.
If I held that domain, I would look into a private offer through a third party. I would offer it to Google to see if they would rather pay my costs so far and perhaps 8 months of forward earnings if it had made any. Remember, the quickest way to get a burn is to dance with the Devil.
I would think that if Google was in a mood to negotiate and buy the domain they would think that 5K would be fair enough to avoid all the hassle an ICANN complaint and court would entail.
I have no idea how likely that scenario would play. Good luck with it. I hope to hear what happens with it.