Please Help How would you grade an antique stereo?


I have a GRUNDIG antique beautiful 1959 Majestic stereo receiver, with record player from Germany. It is in great shape, but I was wondering if anyone knew a way to grade the value of such an item. Any contacts or websites or Any help would be appreciated
stuman6
I have a Orion 1999 blue book. Under "Grundig" the oldest receiver listed was made from 1969 to 1974. Do you have a model number? I remember this brand from long ago...short wave days.
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