@clearthink
You are obviously confused, disoriented, or misinformed by definition NOS means "New Old Stock"
This is excactly what i said "new and never used" and if the item sold on ebay not as described anyone can return it for full refund including return shipping under paypal buyer’s protection.
I’ve heard this BS about "dried up suspension in storage", but in practice i’ve NEVER had this problem with more than 50 vintage cartridges. If the damper is weak anyone can return the cartridge for full refund on ebay with no loss, please think about it, isn’t it the best option to buy something?
Don’t forget that we’re talking about MM cartridges, not an MC.
MM cartridge has removable stylus.
Personally i have no problem if the seller will open a NOS cartridge to check it for a 10 hrs or so, this is more like a free burn-in, honest seller will never try to lie about condition if he was able to check it. This is all good. Factory sealed cartridges have higher market value. After trying many samples of the same favorite models of many vintage cartridge i can make my conclusion that this cartridge does not have a problem with damper at all (even after 30 years in storage).
If you don’t know why anyone prefer Vintage MM cartridges i’m pretty sure you have NEVER heard or owned a decent vintage MM cartridge. Some of them are quite expensive now, some goes for over $1k. Many of us own them and in comparison with $3-4k NEW MC they are still amazing (yes, vintage MM are amazing, not a new $3k MC, not all of them).
I have both MM/MI and MC cartridges in collection. The most problematic cartridge in my life was brand new LOMC, not any vintage MM or vintage MC. Actually those carts from the golden age of analog continue to impress me every month, prices on used market is much better than distributors prices for new cartridges. If i like used cartridge i would look for a NOS sample of this cartridge for collection.
However, the OP asking about $300 cartridge, this is cheap and for this budget i would not hesitate to buy a few to try.
I hope you’re not gonna tell me that Nagaoka 150 or AT VM540ML are very impressive MM of today ? No, they are not. So who cares if they are new, the problem is that even USED vintage MM is 10 times better in sound for the same price.
Many killer MMs discovered in Raul's old thread by many contributors long time ago.