Should I buy new door knobs for inside doors of rental?

[Steve S.]

House built in 1984

Doorknobs on the inside doors appear to be original.  They are in good condition (both the doors and the knobs) so I wasn't planning to replace them.

Any thoughts?  Not sure if this would add much value to a prospective renter

[Thomas S.]

Why would you need to replace working knobs. It will add nothing to your income and is most likely insignificant to a tenant. Ridiculous.

I do not see the purpose.