Hard to tell this (relac) for sure from the pics. In some the lacquer looks the same color as my original 30M. None of your pics show a good, close-up, and in focus view of the engravinglooks like a relac. to me and i would value around $2200-2500,as it will need a complete overhaul and the case is probably a little rotten too from basement sitting?
a mediocre player and a mediocre saxophone tech and a conn player and conn lover.(for all I know he may be a great and experienced saxophonist and/or horn tech)