VR; There are several variants of the FN Mauser action including a single shot - these were basically an inproved "metal wise" military 98s, all had a swept back bolt handle and predrilled for scope mts. The FN Supreme 400 had several changes, eg. bolt shroud - plain, ejector/bolt release - spring type, bottom metal - aluminum with a hinged floorplate, sidesafety - on the trigger. There is a very good write up in "Bolt Action Rifles" by F. de Haas. IMHO any FN is "one" of the top Mauser type actions available. Price - just checked out the Epps site, Safari, .30-06, $1099.00 and a .458 at $1175.00 Cdn. supposedly in VG condition, will give you some idea. This is strictly a guess on my part but I would think you need to add $500.00 for a Medallion and likely a $1000.00 for an ?Olympian. Take care --- John303.