Do cartridges have shelf lives? (Ortofon MC30 Supreme)

The thread starts as follows: Just found my old Ortofon MC30 Supreme. I only used it for a year or two then put it back in its box and forgot about it over 10 years ago! I have no intension using it, but I remember it was perfect when I took it off. It still looks mint (not really relevant). Does the suspension degrade over time? Would it be worth selling?

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