Real estate is on an all time low period. So it doesn't really matter where you put your money to. Since , Berlin is the new hotspot of investors ,go for it. Also you should compare the construction rates , and mobility from your property. Real estate will take up some time to grow , but gradually it will climb up. Amsterdam also has a few rules , which were liberalized recently.
I agree, I think real estate prices are low, probably cant go too much lower. Also interest rates are at historic lows. A house is a long term investment, for me it was a no brainer. Good luck with your house hunt.