I think you are missing the point. The person who mentioned educational pricing was asking if there are any machines with comparable performance and silence for that little a price, and said that the educational price is €650.

Suppose I know of a non-Mac that has similar performance and silence for €1000 non-educational. To decide if that meets the requirement I'd need to either look up the non-educational price of the Mac to compare to €1000 or I'd need to look up the educational price of the €1000 machine (if it has one) to compare with €650.

They are more likely to get useful answers if they post the non-educational price so that people don't have to do extra work to figure out if they should respond.