The PAS will not value a find, though ‘Treasure’ items are valued by the ‘Treasure Valuation Committee’ as part of the Treasure process, if found to be Treasure and a museum wishes to acquire. As a single find it would not qualify. But this coin does not appear to have been reported to the PAS, and I suspect that the landowner is unaware of its existence, if genuine. To my mind it is not an obvious fake, as most are, and indeed may be a die duplicate of the PAS one .
Jerry