A few years ago land was ridiculously cheap. Nowadays land is rather expensive particularily in touristic areas. Another issue about land is property titles that have to be checked and are not in order all the time. Another issue is related to reselling the land. Even if the price is good when investors buy, they have difficulties in reselling their plots later when they add the capital growth.
Romania has unfortunately a bad infrastructure and that nearly cuts off interesting parts of the country. Due to this, big areas remain undeveloped while others such as Bucharest are overpopulated. Unfortunately the state is putting money in the already developed areas, leaving aside the less developed ones. So even if there is potential it cannot be valued unless opportunity is created.
Bucharest infrastructure itself is very bad and it is ridiculous for an EU capital to have only 1 ring road!
Because of these aspects I tell people to buy land in areas around the major cities, land with development potential, if they can find for a reasonable price of course.