say, how much would you want for that planet?

Could the far future see a market for selling entire planets not too dissimilar from today's real estate market?

For just a moment, let's pretend that we solve the controversial legal issues that surround how and if we'll mine asteroids in the near future, and have managed to expand our way into space faring cyborgs with warp drives capable of shuttling us from solar system to solar system in an acceptable amount of time. Over thousands of years, we'd have visited countless planets in our post-scarcity futuristic pseudo-utopia, and those with the means might ask themselves what if it would be a good investment to buy an entire world. You know, much the same way people buy expensive houses and private islands today. How much would something like that run a tycoon in the far future? Obviously it would have to be some insane amount of galactic credits. Several asteroids we'd like to main are worth tens of trillions of dollars in today's cash. Typical, smallish, rocky planets like ours are ten orders of magnitude larger or so, and with fewer easy to access resources due to their molten innards, they should cost tens of septillions of dollars, right?

Seems a little simplistic, don't you think? Remember that when you're out shopping for an alien planet, you're already living in a post-scarcity world with 3D printers ready to create your cities, infrastructures, and anything else you need at a moment's notice. And settling on other worlds would mean that you have to be extremely self-sufficient, needing nothing more than access to interstellar communication networks and able to easily live off the land with your portable power supplies which allowed you to cross the vast distances between solar systems. That means not that much mining is going to get done on your new world, and the lack of demand means lower prices. What good is a million tons of gold if no one wants it or needs it? And if no one needs it, no one should be charging you for it, especially when you're just going to extract the little bit of resources you need as you need them on your own. With resource values now out of the price, what exactly would influence how much a planet is worth? What the previous owners left?

Well, it may just come down to the same three most important things in real estate prices back on our boring little home world: location, location, and location. How close is the planet you will buy to hubs of civilization? Can you invite people on vacations, or safaris in alien jungles, or get scientists to excavate the ruins of a long gone extraterrestrial civilization? Does your new world offer some sort of gateway to other star systems, the last place to refuel and patch up a ship in the next few months or years of travel? Are there pretty views of the Milky Way in the night sky, and magnificent oceans you can explore? Those are likely to be things by which a species that can travel to other worlds will judge how much a planet is worth, rather than the value of what's there to be mined or otherwise extracted. Still, considering how many people there will be when we're spread across the stars and how many of them will be doing something akin to a normal job today since all the machinery they will depend on won't maintain itself, it's likely that planets will be a super-luxury item for the future top 0.1% who own the rights and blueprints to all of the technology making space exploration on an interstellar scale possible as an investment…