Do the (factory) ABS tanks start breaking down given enough time? Do they become 'weaker' and more prone to crack?

Reason for asking, I suddenly realized today the 36 gallon tank I have from a '76 Ramcharger is almost 50 yrs old. It was last used back about '98 and has been sitting empty in storage since then.

I need to get rid of it, but don't want to sell someone a potential hazard.

Anyone?

(and no, this is not a for sale ad, so don't turn it into one )

Thanks!