It look like it have a Ans Phase II regulator, this was a mod. ANS regulator was designed to compensate for a flaw in the manufacturing of automag valve backs in the early 90's, However, this mod is no longer needed on Automags. Airgun Designs fixed thier flaw back in the early 90's when it became apparent. ( The air hole in the back did not line up with the air hole in the front.) It has a double trigger frame but unfortunately not an AGD which is the more desirable one. The value £ 60-80 in the end it is always the buyer who sets the price. Good luck with your sale.