The most reasonably priced component used on the Civic 1999 (x) 2dr Ex Abs (ka) Auto Radio is the Ring Rubber.
The Auto Radio is made up of components including this Set Tuner Assy which is the most expensive.
Some items from this specific schematic: Screw,tapping,(po)4x, Brkt,radio R, Screw,tapping,4x8, Ring Rubber.