Is there any sence to talk about price ? As to me foreign language learning is rather a matter of luck of finding a really responsible interesting tutor . And It is not a matter of low/high price. Five years ago i changed 3 expensive tutors over 4 months before i found the one who really was keen to make me interested in English.
In our material world, in the world of selfish people it is often a usual situation when high price doesnt quarantee services of high quality))
To give you direct reply to your question..I paid 20 $ per 60 mins 5 years ago. It was OK with me. But i live in a capital city and i could afford such a high price because of my relatively high wage.
Nowadays i would revise my readiness to pay such a high price .