Deutsche Grammophon Beethoven Bicentennial Collect

I inherited this collection from my brother and never listen to it. There are 12 volumns. Does anyone have any idea how much they might be worth or how I would go about finding a buyer who would enjoy them? Thanks. Kate
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Sorry, not worth much. If you need some Beethoven might be worth keeping. The DG set of Beethoven symphonies to have is the early 60's box set with DG tulips, with Berlin and Von Karajan.