Professional painters won’t ever reuse rollers since they aren’t without complications. Would you want your professional painter to start off with only being able to do a 90% perfect job? Because the roller is used and worn?

What painters will do is resuse an older roller for the primer and first coat, but the last coat will always be with a brand new roller. It’s just not worth the risk of a subpar job. You want to explain you were cheap and reused another clients roller? And that’s why there is imperfections.