At the time I didn't have much money so I just kept the drive and decide to possibly face the issue.
I still use it, of course (it's my personal laptop).
Some days ago I switched to root and noticed a dead.letter file in root's home directory.
I examined the file and it was an email dropped into the home directory by smartd, alerting me that my hard drive was near failure.
The funny thing is, that email was from February 2018. More than two years since that email, that drive is still working.