Land with olive trees is really not worth selling where I am unless it’s huge (and even then; people have 100000s m2 and no one is interested in it; you have to maintain it because of fire hazard and you cannot build on it). If it has a (legal) house on it then, depending on the state (if it’s inherited it will be almost or completely classed as a ruin most likely as it wasn’t kept up properly), it’s worth more, but still not a jackpot.

If you are poor and want to live here you are better of putting a caravan on your land than selling it for peanuts and not being able to do much of anything with that money (maybe 1-2 months rent). At least working the land will pay you something and you can trade olives for other goods (many of my neighbours live like that).

Most land / ruins won’t get sold at all; people move away to the cities for jobs and just forget about it, or, family feud and they cannot agree; the result is the same. Usually the neighbour just uses it as their own ‘until they come back’ (which often is never).