If Quincy still builds them like they used to your great grandchildren will own it some day.
I have a 5 HP single stage 2 cyl that has already seen 30 years of daily service. & it runs a bunch every day. Supply’s all our needs for air chipping hammers & needle scalers, & die grinders in the welding shop along with many blow off nozzles in the machine shop.
QUINCY make a nice compressor their valves hold up really well. When I had my repair shop Quincy & Rol-Air were the best. But I liked Quincy valves better than Rol-Air who used a floating rectangular reed. Quincy had a round spring loaded disk, the seat held up better and could be reground. Use synthetic oil and it will last beyond your life time.