My first instructor, an amazing fellow who went by the name Ishikawa Ken-Ichi, only taught to friends, for free. Two classes a week, approximately 2 to 3 hours a class. He then considered making it 30 euros a year, but unfortunately he moved and I lost track of him. I don’t know if he still teaches, and if he does I don’t know if he charges for it now.
Then my jujutsu / kobudo instruction in the UK, at the hand of Mr. Garry Philips (rokudan) was 5 pounds a class, 5 classes a week (1 on Monday, 2 on Wednesday, 2 on Saturday). Attending two classes on the same day got them reduced to 7 quids for both (which was systematically the case for me since I always attended all 5 weekly lessons).
My Chinese MA instruction in France, by Mr. Nguyen Nguen-Ha (qiduan, Chinese equivalent of a shichidan) costs 380 euros a year for one weekly class, and for 480 you can attend as many as you like (every week has: a traditional gongfu class, a competition-wushu class, a basic taiji-quan class, an advanced taiji-quan class, a sanda class, a qigong class, each class lasts 2h30).
My iaido instruction, by Ms. Frédérique Sanselme (not sure what her rank is, come to think of it I never asked her) costs 20 euros a year (+ 14 for the federation license stamp), one class a week, 2 hours.