There's a special class of stock (class B) that you can't buy, but has 10x the voting power. Sergey and Eric alone have 69% of the voting power in the stock. And google's executive officers and directors combined have 78% of the voting power. So basically, you can't take over google by buying it out because they'd still have the voting power.
Are you sure your not talking about Preffered Stock, I never heard of Class B? I think there is Common and Preffered. Maybe same thing.
Google has two classes of share. Class A share is what was sold to the public. Class B share is only held by the two founders and the CEO. The Class B share offers 10 votes per share compare to a Class A share of 1 vote. Combined, the founders and CEO control enough Class B share for them control Google, even if someone buys all the oustanding Class A shares. So a take over is pretty much impossible.
Google is only really worth what someone is willing to pay for it. That is true of pretty much anything. You'll never really know what it is truely worth unless it sell.
Shares are bought, not the company. Again, it is worth what someone is willing to pay for it. If someone offered 100 bucks and those with a controlling interest agreed to sell their shares for that in total, that is what it would be worth. Stock price means nothing when it comes to valuation. You have to look at a lot more than stock price when doing a valuation.
Well, if they do decide to sell I hope they post in DP's marketing forum so I can have a chance to bid. Also, to be fair they need to start the bidding at around $100 and let us bid in $5 increments for the remainer of the auction.