His prices is are good but they aren't ridiculously low. The thing about him is that he sells a bunch of different stones for the edge pro by brands you don't see. He claims that he cuts them himself.300 is a little small, and even though 100% positive feedback I don't know if this is meaningful here. If his prices are too good to be true, then they likely are. I recently paid for an atoma on amazon because it was half price and amazon guarantees purchases. The company made a phony shipment and bailed, so I won't be dealing with the likes on amazon again.