@chakster
There is no such thing as new/old stock in cartridges. All the materials used for suspensions harden over time by drying out or oxidation.
The suspension on an unused cart that is 20-30 years old will have hardened to the point where it is pretty well solid.
Such a cartridge requires a new replacement suspension and possibly other parts according to model. With some manufacturers now out of business this may be impossible without specialist fabrication of a like for like replacement.
Frankly it is a much better deal to buy a cart of recent manufacture.
There is no such thing as new/old stock in cartridges. All the materials used for suspensions harden over time by drying out or oxidation.
The suspension on an unused cart that is 20-30 years old will have hardened to the point where it is pretty well solid.
Such a cartridge requires a new replacement suspension and possibly other parts according to model. With some manufacturers now out of business this may be impossible without specialist fabrication of a like for like replacement.
Frankly it is a much better deal to buy a cart of recent manufacture.