nos vs repop's

With doing distributors, I stay with NOS/NORS points and condensers. Now vac advances I send out to get rebuilt. Issue is the rubber diaphragms. Really depends how they were stored over the years. Nothing like buying a $200 vac advance and the diaphragm is bad. You really cant send it back even from a known good suplier like AMS or Arizona. To me really depends on what the part is. Caps and rotors the new stuff is pretty terrible.