The A's are not for sale—that's what lead man Lew Wolff has said repeatedly in public and what principal owner John Fisher has told to at least one interested potential buyer recently.

The recently interested party, according to multiple sources: Warriors co-owner Joe Lacob, who has reached out to see if Fisher might want to sell the A's at some point soon.

I've heard that MLB has monitored this situation and was aware of Lacob's interest—and Fisher's non-interest in selling.

There are signs that Lacob could be thinking about trying to build a new stadium for the A's on the Howard Terminal site, though obviously that scenario is based on many other moving parts (and that general interest was first reported by the East Bay Express back in December, and here's a December blog-post in which I asked Lacob specifically about his thoughts on the Howard Terminal site).

Golden State Warriors owner Joe Lacob reacts to his team trailing the New York Knicks in the fourth quarter of their NBA basketball game at Oracle Arena
Golden State Warriors owner Joe Lacob reacts to his team trailing the New York Knicks in the fourth quarter of their NBA basketball game at Oracle Arena Sunday, March 30, 2014, in Oakland, Calif. The Knicks beat the Warriors 89-84. (Susan Tripp Pollard/Bay Area News Group) ( SUSAN TRIPP POLLARD )

But Fisher has given no indication that he's looking to sell.

Therefore, Lacob's interest in the A's is now very much on the back-burner, the sources say.

Still... Lacob is hardly the only big-money operator with proven sports credentials to check in with Fisher about the A's in the last year or so.

There is some sense that the A's stadium frustrations will probably lead Fisher to at least explore the possibility of selling the team, which means there are potential buyers jockeying in the background in case Fisher suddenly changes his mind.

And most of these interested parties, I'm told, would be interested in keeping the A's as the first and best option—if a stadium deal can be struck.

The point is many potential owner-types believe the A's could be available soon and that they are an under-valued asset given their profitability, baseball's booming economy, and the possibility of a giant revenue take-off if a new stadium can be built.

Of course, Fisher and Wolff probably have many of these same thoughts, which would naturally lead them to be very careful about any thoughts of selling control of this franchise.

For instance, every MLB team's digital media rights are worth a substantial amount—more than $20 million annually, maybe upwards of $40M annually pretty soon, I've heard—and that's before you start counting national and local broadcast revenue, ticket revenue, and all the rest.

What would the A's sale price be right now, theoretically? I've heard it starts at $500-plus million and could go much higher than that... and this is with zero line on a new stadium and no clarity on what the next CBA might provide as far as revenue-sharing.

If the proposed buyers thought they had a line on a new stadium... well... the number could get very, very high.

One person I respect says $700 million is the realistic number, and again, that might be exceeded swiftly if there is a bidding process.

Does Joe Lacob have that kind of buying power? As I always say: He outmaneuvered Larry Ellison for the Warriors when Ellison really wanted to buy the Warriors, so I never put anything beyond a guy who can do that.

Again, here's what Lacob sent to me via email back in December when I asked specifically about his interest in the Howard Terminal site:

"I am and have been very familiar with this site and I think it has interesting potential as a site for a new baseball stadium.

"I believe that MLB might hold a similar view; I can't speak for them.

"If I were the city of Oakland, I would be excited by the prospect of development of that site and the potentially revolutionary impact on the city of Oakland. Look at what the Giants ballpark did to stimulate development and positive change in the south of Market area of SF.

"With that said, we are completely focused on Piers 30-32 for our new arena."

Read Tim Kawakami's Talking Points blog at blogs.mercurynews.com/kawakami. Contact him at tkawakami@mercurynews.com.