I recently got a Silent Partner Swing and have become very comfortable with using it. Now my friend is interested in having me string her racquet. My question is, should I expect her to just buy her own string then give it to me? This would mean that she would order it online, since if she goes to a large sports store and pays their price, she may as well have them string it for her since it's included, right? Also, what is a fair price for a stringjob for a friend who provides their own string?