Seeki.eu lists 950+ properties for sale and 400+ to rent in Biscay.
The median asking price is €335,000, or €3,793 per m² on a typical 85 m², across sale listings that publish both a price and a floor area.
On the rental side, the median asking rent for an apartment is €1,400 a month, across apartment rentals that publish both a price and a floor area.