During the British rule, in those days, land is almost a luxury belonging only to the noble and wealthy.
Today, this is more systematically coded under the National Land Code 1965.
Transparency is the key word and until today, red tapes are still a major uphill to many a practitioner.
Not easy but again, not really difficult either.
One has to make all the checks and searches and get certified copies of plans, maps etc from the relevant authorities to ensure what you buy is what you get.
To buy a kati of vegetables, you have to weight whether in kati or 600 gm.
Times may have change, but the weight of land dealings are still the same.