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Is Marissa Mayer worth more than Tim Cook?

Since coffee with Apple CEO Tim Cook went for $610,000, Yahoo's CEO decides to auction lunch with her -- and it will take place at Yahoo HQ.

Only worth $25,000? Surely not. Screenshot by Chris Matyszczyk/CNET

You can never underestimate the competitiveness of your average CEO.

You can also never underestimate the business sense of charities who know when they're on to an easy earner.

Tuesday brings news of Marissa Mayer trying to see whether lunch with her might be more valuable than coffee with Tim Cook.

Recently, someone who clearly values power over food paid $610,000 to have coffee with the Apple CEO. This was all organized by auction site CharityBuzz, which guilts people into doing exciting things and paying for them hugely.

Now, similar forward-thinkers are being asked how much it's worth to lunch with Yahoo's CEO.

From Tuesday until June 27, you can go to CharityBuzz and bid on what promises to be one of the most exquisite meals of the year.

Mayer has decided that lunch with her can only take place at her favorite restaurant. It's called URLs.

Perhaps you have not been there yet. Reservations aren't easy to come by. And it's not exactly in the most salubrious of locations. For URLs is the canteen at Yahoo HQ.

It is all, of course, in a very fine cause -- the Aspire East Palo Alto Charter School.

It isn't clear how long you will have to pick Mayer's brains and decide what the future of the world will truly look like.

I am concerned, though, that the bidding has begun a tad slowly. At the time of writing, $6,250 is the highest bid.

What is even more curious is that the site estimates the value of this lunch to be a mere $25,000.

Mayer herself once bid $60,000 to have lunch with Oscar de la Renta.

Could it be the location that is causing the valuation of this lunch to be so modest?

I fancy the number will reach greater heights. I fancy that when some fine entrepreneurial type realizes that Mayer is buying companies with gusto currently, he or she will stump up a large sum as an investment toward a far bigger investment.

Surely someone will offer, say, $611,000. Surely.