Cellbuddy is trustworthy. I personally feel it. I have never encountered any issue with them. I usually buy from all e-commerce sites. They all are good.
But personally I fount cellbuddy is genuine site. I always get best quality products from them. I am an old customer of cellbuddy of cellbuddy, I have been buying from them for last 3 years. It has always been a great experience with cellbuddy in fact they have very simple return policy. If I return any products they pick-up, refund or replace the product within a few days.
I would suggest you if you never buy anything from cellbuddy, do it now. Then only you will come to know about this site. You will really like cellbuddy.