I don't know if there are other threads about this, but I recently noticed something while exploring that has led me to a massive cluster of non-sequence stars. My focus had been finding Earth like systems and I realized there seemed to be a floating pixel on the screen. It was hard to tell at first if it was a dead pixel or not, but then it moved funny as I moved around. I'm sure this isn't a coincidence, but when I searched the galaxy map when I saw the floating pixel, there were a few non-sequence stars. As I continued my search, this happened continuously. Every time there was a floating pixel, there was a non-sequence star. This has led me to a major cluster of un-touched systems and is now the manner in which I'm exploring. So for any explorers out there looking for high price systems, this seems to be the best way I've found. Hope this helps.