Yup I agree with what Honkit said "what is the definition of high grade sps to u?" By price? Price is set by people, so even a common sps can fetch a high price, if there is willing buyer. If by the colour, are your tank ready for the unique colour sps? If not then no point buying ex and unique sps if your tank cannot support, it will brown out and become a low grade sps. End of the day, maintain your water parameter and even the most common sps will look like high grade sps in your tank.