This may not apply anywhere else (though I suspect it does), but in the Netherlands the office space market is deliberately kept obscure due to the much higher supply than demand. Many thousands of square meters of office space are currently vacant, and real estate investors are terrified of the paper value of that office space collapsing.

As a result, cost and availability are deliberately kept obscure. Cheap small office space is abundant, but usually not offered publicly. You have to ask, and then you get things like "sure, we can split this huge space into smaller units", or "we'll throw in x-months free rent" (so they can officially keep the rent, and therefor the value, high).