in fact there's an online used market for Thomastik Infeld Spirocore bass strings.
Some guys like them new and zingy, but can't stand them after 6 months.
Some guys can't stand the six month break in period, and buy them off those guys to use for a year or two.
Some guys can't stand the 2.5 year break in period, and buy them off those guys.
And so on. I knew a guy who had 20 year old spirocores on his bass, and said they got better with age - "Like Black Socks".