Dont know if this helps you at all ?
http://www.roger-russell.com/speakers2.htm#xr240
Or maybe subscribe to the Audio Bluebook ( or maybe you know a member that has it, and they can tell you a going price )
http://www.roger-russell.com/speakers2.htm#xr240
Or maybe subscribe to the Audio Bluebook ( or maybe you know a member that has it, and they can tell you a going price )