I assume you've read my comments in this thread:
https://www.bikeforums.net/classic-v...-prestige.html
Assuming the Prestige that you're looking at is circa 1977, the frame should be hi-tensile steel, as opposed to plain gauge CrMo. Consequently, it will be a bit heavier but will be well under 40lbs and should be around 27-28 lbs, depending on size. The earlier versions also had a more conventional geometry. Major components should be SunTour Vx derailleurs with bar end shifters, Sugino Super Maxy crankset, Dia-Compe centre-pull brakes and Sanshin Gyro-Master hubs laced to 27" aluminum Araya 16A rims.
Mid double digit range sounds like a good deal, provided there are no major issues.