Thank you for the offer. You could see my rates here: http://english.englishinternacional.com/skype-english-lessons-2/   Briefly they are from $8.75 x 50 minute lesson in group classes of 2-5 people.  The private, individual tutorials are from $18-$24.  Sorry I have to quote USA $.

 I am a Ph.D and former professor at Oxford and Cambridge and Canadian universities.  Contact me on Skype if you would like more info: english.teacher.skype