Adwords Highest Bid

How much a click can worth? The highest bid on Google Adwords program.

A single click can cost from cents to more than a hundred dollars or whatever someone is willing to pay for a click.

For example, I have seen consistently on Overture the keyword "menu" with a cost per click of around $90 dollars. Who would think that word could cost that much.

Where are the most expensive keywords

Some people say the highest adwords bids are related to b2b. Finding the exact keywords can be tricky, as with the previous overture example.