Need help establishing value of car
 

I have inherited a '79 VW SuperBeetle (Karmann) with 67k miles on it. It has been garaged for the last 10 years. 1st 65k miles were with 1st owner ('79-'89). Body is in great shape - original paint. Seat good. Needs new floor cover and soft top. Any help would be appreciated. Located in Silicon Valley area.