I just aquired a Nishiki international 10 speed serial # KS290652. Chrome Moly lugged frame. 27x1 1/8" tires on Araya alloy wheels. Suntour derailleurs with stem lever index shifters. Dia-Compe center pull brakes. I have serviced the axle, steering head and bottom bracket bearings. Paint needs some touch up. Chrome is good. I am wondering what year it is? What might it be worth?