Genève (Geneva), Switzerland
Cheapest apartment is 38mΒ², 2 rooms, 570'000 CHF (646'000 USD)
That's very cheap. It's a shitty flat but livable if need be.
https://www.immoscout24.ch/buy/4000814125
Cheapest house is 240mΒ², 6 rooms, 2'950'000 CHF (3'347'000 USD)