Does a 1977 50 Deutsche Mark bill still have any value?

Answer 1

It was worth about $25 in 2002 when Germany switched to the euro.

If you're travelling to Germany or know someone who is, the German central bank (Deutsche Bundesbank) will exchange old DM notes and coins without surcharges at any of its regional branches in Germany; these are located in most major and many secondary cities.

In the US it may be possible to exchange it at a major American branch of a German bank (e.g. Deutsche Bank, Dresdener Bank, etc.) or at a currency trader such as Amex, but the conversion charges for an obsolete bill will almost certainly eat up most or all of its exchange value.