Hypothetical civ bonus: Start with more food, less villagers

I want to discuss a hypothetical civ bonus: "Start the game with +X food, but -1 villager". What would be a good range for the value of X?

For example, X = 50 does not make any sense, because you would be one behind in the villager count without gaining anything (hence not a bonus). On the other hand, for example, X = 1000 would be too much, because you could probably click Feudal at 5 pop and spam scouts while the enemy is still far from clicking Feudal, which is OP.

So, what is the minimum value of X to call this a "bonus" rather than a disadvantage. And what value should X not exceed to not break the game completely?

Note 1: This is the opposite of Mayan civ bonus, but we still want X to be high enough to give the civ a slight advantage.

Note 2: I'm aware of the SoTL video on the value of a villager. The video is relevant, but not an answer to this question (because it answers how much resources you lose by losing a villager, rather than for how much you could sell one). I personally still consider X = 500 too high, but it might be debatable.