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For Jan Brady, the perennially put-upon middle daughter of "The Brady Bunch," it was all about "Marcia, Marcia, Marcia!" For actress Eve Plumb, who played Jan, her Malibu home that's now on the market is all about location, location, location.

And location is what's being sold. The 1950 bungalow, owned by Plumb's family for more than 40 years, is marketed as a teardown -- and a rather pricey one at that. But for $4,950,000, even for the land alone, this kind of property is a rarity, according to listing agent Brian Linder.

"There's only so much beachfront property in the world," Linder says.

Putting the obvious aside, this property, located on sought-after Escondido Beach, is a pretty prime slice.

Turns out that the TV star, who got her start acting in commercials back in 1966, was a savvy real estate investor at a young age as well. Now 57, Plumb purchased the beach house for her parents in 1969.

"She bought it with the proceeds of her income," Linder says.

The price tag in 1969? Just $55,300, according to the agent. We'll wait as you pick yourself up off the floor.

Besides her astonishing return on investment, quick math reveals Plumb was a wee 11 years old at the time of purchase. Take that, Marcia!

Her parents lived in the home for decades, but after they died the property reverted back to Plumb through a family trust. She put the home on the market two years ago, but it didn't sell.

This time, she tried a new tack, enlisting Staples Center architect Dan Meis of Meis Architects to come up with designs for a breathtakingly modern home that would fit on the lot.

His approach for a future build that could replace the current structure is showcased in the listing, along with photos of the charming cottage currently on the property. Plumb went a step further, doing some preliminary legwork to learn that a 3,500-square-foot, three-bedroom, 2.5-bath house could be approved for the parcel. She even looked into construction permits.

"If this were complete, it would be a $10 [million] or $12 [million] or $15 million house," Linder says. He roughly estimates the cost of building the new home could be anywhere from $1 million to as much as $2 million with the drawn plans, which include some mega high-end features.

Although the design could always be altered to suit the needs of the buyer, architectural details now include a "cantilevered concrete core," floor-to-ceiling glass, a retractable moon roof, perforated metal panels, a car stacker for multiple vehicles, and a pool. Funky beach bungalow, it isn't.

For any future homeowner embarking on a new build, there's the bonus of the well-kept existing 850-square-foot Craftsman, which is already a rental property. It could continue to bring in income or serve as the buyer's temporary pad before construction commenced.

After all, that 47 feet of beach frontage can't enjoy itself.