You're obviously missing the point of the question, but you're more interested in being a typical high end audio elitist snob and running others out of the hobby (no wonder the industry is dying) than you are answering a simple question, from someone who could learn from your experiences.
I can obviously buy a new Stylus for the Grado FZ3 at a cost of $55 to see if the cartridge is still good - I don't know any other way to test a cartridge. I could also use that $55 and buy a new Shure M97xE, an Audio Technia AT95E (I already own 1 of each of those as well as others) or I could use the $55 to partially pay for a new Grado Blue.
If the Grado FZ3 is inoperable I'll be out the cost of the stylus since I can't return a used stylus. I could then spend the $110 to buy a new Grado cartridge and have the extra stylus, but then I'm out over $150 (I would have a new cartridge and extra stylus, but it might be a few years before I would need that extra stylus)