Shure says their cartridge shells should last 50 years or a lot longer if cared for. They are after all sealed and have no moving parts. So you should not worry too much about the cartridge.
The only aging issue is the rubber that is part of the stylus assembly. I tends to harden with age if not stored well. If it sounds good to you, maybe it is OK.
The only problem is there are no genuine Shure stylus available anymore from Shure. Most dealers no longer have it. I believe I saw some from LPgear.com that were original (not generic). Also check Needle Doctor. They show them on their website. I have no idea how good the generic replacement stylus are. Some are from Japan, others from Switzerland. The generic replacements probably are just eliptical "E", not HE. But so may be the Shure ones at LPgear and NDoctor assuming they still have them.
The only aging issue is the rubber that is part of the stylus assembly. I tends to harden with age if not stored well. If it sounds good to you, maybe it is OK.
The only problem is there are no genuine Shure stylus available anymore from Shure. Most dealers no longer have it. I believe I saw some from LPgear.com that were original (not generic). Also check Needle Doctor. They show them on their website. I have no idea how good the generic replacement stylus are. Some are from Japan, others from Switzerland. The generic replacements probably are just eliptical "E", not HE. But so may be the Shure ones at LPgear and NDoctor assuming they still have them.