Feedback when you first start can be tough gig. Untill you build up a bit of history, buyers are definatly a bit shy about dealing with you. I started a new account some months ago and it wasnt untill I hit around 40 feedbacks that buyers started to take serious intrest in my items. After that it was business as normal with overseas customers, buyers willing to buy expensive items etc. You have made it to 50 pos. feedbacks, so as long as they remain positive, it should not be a major issue for you now. I only recieve feedback for 30-40 % of items I sell and only keep a watch on it every few days in case of problems. Once you have a good basic score, it only really matters that it all stays positive. Try not to stress about it too much. If you keep up the good work, the feedback will take care of itself over time.