katholieke universiteit leuven offers a masters course in AI for about EUR 5000, on campus. I checked with them in Jan of 2012. I then asked the professor if this was for students of Belgium and what is the price for international students ( I am from India). He confirmed that the price was the same. The university is ranked about 68-75 in the world, of course that is subjective.

I feel the USD 40,000-50,000 price is overpriced for the on campus course. People should verify independently of me about the University of Leuven and post something here.