what is my barber chair worth

this chair is complete, no cracks or broken pieces. every upholstry tack is there. head rest and strap there. hydraulics work. chair leans back. two screws missing on foot section. plate on back of chair states : NO. 505 CONGRESS HYDRAULIC PAT. OCT. 22 1895 DEC. 3 1901 MAR. 1 1910 APRIL 12 1910 MAY 17 1910 DEC 6 1910 SEPT 24 1912 MAY 13 1913. MANF'D BY KOKEN BARBER'S SUPPLY CO. ST. LOUIS U.S.A.

Have many pics but could only load one on this sight. ???