Hi there and welcome to the group !! Glad to see you enjoy it !! Your hall chair is in the Jacobean Revival style,,first quarter of the 20th century !! Hard to pin down a date !! Some refer to these as Gothic Revival !! Value would depend on the condition of the chair and your location !! Here in Texas,, these high backs do not sell very well !! But if you go with the Gothic theme,, you may find a larger audience !! There are many that like the Gothic style !! Would sell better in a metro area !!