How much is this old Grundig radio worth?
I did a completed listings search on ebay for just grundig Majestic and came up with a wide price range. The ones close to yours in model number are somewhat expensive but that doesn’t say much either way. My suggestion would be to list it on ebay, with as accurate of description as possible, and also the disclaimer that you don’t know much about radios and if people have a specific question though should ask you. Start the bidding at the absolute minimum you’d be willing to accept for it, and have shipping reflect what it will cost you to ship it. The worst that could happen is no one will bid, and you can give it to goodwill. Odds are, if you take it to goodwill, an ebayer will buy it and list it anyways.