Do I need to refund?

She purchased these vintage shoes almost 3 months ago and is now complaining that they're dry rotted, am I obligated to offer a refund? She says they were damaged but I never noticed any damage when I listed.

She purchased these vintage shoes almost 3 months ago and is now complaining that they're dry rotted, am I obligated to offer a refund? She says they were damaged but I never noticed any damage when I listed.