Big Difference between wire, bearings, and rubber elastomers. I have stated this before. Experts before, in the age of vinyl nirvana, in the 1980's always recommended that cartridges be replaced every 18 months regardless of useage, including NOS, never used. This is due to the oxidation that occurs naturally. This happens to Pinch Rollers, Belts, etc...on tape decks as well. But these are much easier treated with rubber cleaner/conditioner to restore the rubber. This is not easy, and almost impossible to do with the damper in a cartridge. Its definately risky buying old, NOS cartridges for this reason. its human nature, gonna happen, you cant change that. so, much safer to buy New Cartridges that are within proper date. i know that many of you post here whatever Raul says, but thats his opinion, and he is entitled to it. But doesn't make it right. Id be wary of NOS cartridges, unless you can buy new quality replacement stylii, like those from JICO. Then its a different story. Ray