MC phono cartridge lifespan (when not using)


I have bought a new Benz Wood SL and a few weeks after I have received a new Benz Glider as a gift. I have the Benz Wood mounted on my Ittok and really like the sound....I’d like to know if it is wise the keep a Glider as a spare/replacement when the Wood is worn out....That could be in 5 years or more.....so my question is really....will the Glider sound as it should in 5-10 years or will some parts deteriorate even when not using.... Suspension parts or oxidize coils or any other parts....Or should I simply sell it and buy something else when needed.....I know the Wood sound a bit better but I could live with the Glider as I had one before and loved it....
128x128garylb
I would be suspicious of any claims of using "100 Year old elastomers" as polymer chemistry had its start circa WWII, and the aging properties of natural rubber is not so good.
I have a few NOS Fidelity Research MCs. They're probably 35 years old, and every one is fine (with no special storage). So are MCs from Dynavector, Koetsu, Audioquest — but that's just a few brands, and one can't draw a sweeping conclusion from it. Van den Hul recommends storing his cartridges in your freezer! Sealed against moisture of course. 
Gary, your alternative — to sell it and buy a new one in 5-10 years — presumes they'll be available; be good; and have sane prices. I wouldn't presume that. 

Two great MC cartridges.... Everyone should have problems like that!

.... or you could just send me the spare one and I promise I'll look after it for you :-)

G
Gary, my bad. I had no idea there is now a low output Glider. None of my remarks would apply therefore.