Telefunken stereo system from 1960

[Electronic M]

Depends on location, condition, desirability of the model, and what the market for such an item is in your area. The value is what someone wants to pay for it. I can imagine it being worth somewhere between 5$ and 150$, but beyond that you will have to take a guess and try to sell it for what you think you can get for it in the time frame that you want to wait for a buyer.