Oh, then you don't need to buy them, just wait a while. With very few exceptions (mostly a few "ecohouses" for foreign tourists), no developer touches those villages with a ten foot pole. Between the desertification of the region, the crashed real estate market and the cost of rebuilding those houses, the average return is probably between "terrible" and "catastrophic".
Not to mention the qualification of "... if the ownership rights were determined." Nothing like making a substantial investment and then -- if you actually turn it around -- having a couple dozen claimants pop up suing you for illegally occupying their ancestral/childhood lands.
Yeah, like I wrote in another comment, I'm personally expected to inherit ~1/52 of a small piece of land ;)