So if you want somthing decent you are talking around 600,000 zlt you could possibly get a small one bedroom in a rough condition and in a rough area for around 350,000zlt.
I'm sorry, but this is complete nonsense spouted by 'property speculators' who got sold overpriced flats in Poland with high mortgages that they can't get rid of. The truth is far, far from this - and prices are still dropping at the minute, especially for communist-era flats.
Is an example - in a flat from 1903, which tend to be solid. Located not far from the centre of the city, 2 big rooms and in a more than inhabitable state.
Wroclaw doesn't really have 'rough areas' either.
I can safely say that in Poznan at least, the communist blocks are actually in better shape than many buildings built in the 90's. I wouldn't be surprised if the same holds true in Wroclaw.
If I can give one piece of advice - stay away from English-speaking property consultants. My business helps foreigners in Poland, and the one thing that is blatantly clear is that the vast majority of these, even the native English speakers have absolutely crazy expectations.
The truth in Wroclaw is that you won't get a new build flat, fully equipped in a nice area and a decent (50sq+) size for 250k. But you can get a communist block or even earlier, equipped, in a safe area, and a decent size for 250k, that much is certain.