triple pressed rocking chair

This chair has been in my family since the 1980's when it was purchased by my father for his antique business. At that time my mother was taking a class for furnature restoration and used this chair for her class project. When this chair was first purchased it was painted black and the cane seat was nearly gone completely. but through the restoration class my mother paid alot of attention to the detail on the back of the chair and used a nut pick to get all the paint out of the crevices of the design. then the teacher of the class offered to put in the cane seat because it was too advanced for my mother to do at the time. My father said that the chair is about 100 years old but was not exactly accurate. My parents would love to find out what this chair is worth now. When my mother restored it she was offered $500 for it and that was in the 1980's. could you please help me figure out what this is worth? I have done some checking in books and online and came up empty. any help would be greatly appreciated. thank you so much for your help...