From free to a few dollars a month.  It all depends on the features you need.  I find the most helpful ones do a great job of auto-filling website user and password fields (the majority of them have a hard time with certain sites).  Free password managers usually don't let you apply passwords to mobile devices or cap it a 1 or 2.  For that reason alone, the couple bucks a month is worth it for me.
The good news is most pay managers offer free 30-day trials.   Give it a whirl with a few passwords -- should be plenty to decide whether it saves you enough time.