I can tell you, here in Gießen the old houses are going like hotcakes. 60s houses, some work done, but not much, still with a 1000 sqm plot, go for €360,000. Plots in new development areas around Gießen (5 minutes by car or bus) are then sold developed by the municipalities for €215 to €270 per sqm. You just must not own any property and small children must also be present, otherwise with so many interested parties you really have no chance.