Reasonable prices are not limited to Poland.
There are many options for time building in Europe.
Skytaxi which is based in Hungary is conceivable. 1 hour for C152 is 99 €.
Fuel, tax, landing fee and safety pilot included.
Blackbushe Flying Club offers good rates. It is based in London.
1 hour for C150 is 85 £ = 93 €.
1 hour for C172 is 135 £ = 148 €.
Fuel, tax included. No membership is required.
Note: As I said before if flight school or flight club wants extra money for check out, familiarization training etc. (even if you purchase 50-100 hours), never take them seriously.