mmxPerhaps Maverix might be a candidate ,it is involved in Northern Vertex .Generally the p/e for royalties is 20 ,that is what KRR has had to pay MMX to reduce its royalty on the beta hunt .This would value the Vertex royalty at around 60 million US .Approximately 8 times the current value of all of PGOL.Someone sold a few shares at the close to keep suppressing the price .