Do speaker wires degrade over time ?

I have noticed a fair amount of corrosion as my cables have exposed wire (in a high humidity environment) so I would advise you to check on the condition of the terminations. Also, check on the condition of the sleeve or outer sheath which could be symptomatic of damage to the wire.

There is a life expectancy for everything, including cables. It may be thousands of years, but eventually they will degrade down to nearly nothing...

Entropy - the universe tends toward maximum disorder. IOW, everything falls apart.

Well if it was equipment, I might consider it, but It's cabling and it's 30 year old technology!! If you can get it in the price range of free to $25, I would do it.

It is a run of transparent audio for around $225.00