Most Bundes Republik coins dated 1950 and later are worth face value, although, if they are uncirculated, certain pfennig coins may be priced a bit higher. The most valuable 1950 Bundes Republik coin is the 50 pfennig with the inscription "Bank Deutscher Länder," valued at around 800 Euro or $1036.76.
According to UCoin.net, as of 2014 a 1950 Bundesrepublik Deutschland coin is worth anywhere from $0.10 to $20.00, depending on its condition, markings and value. For example, a Germany 1 pfennig 1950 coin with a Mintmark "J" - Hamburg on it is worth $0.14, while a Germany 1 1950 Mintmark "D" - Munich coin is valued at $18.34.
According to Wikipedia, the inscription Bundesrepublik Deutschland (Federal Republic of Germany) appeared on the coins starting in 1950. These coins were issued in denominations of 1, 2, 5 and 10 pfennig. German coins include a mint mark, which indicates where the coin was produced. For example, the "D" indicates Munich, the "F" indicates Stuttgart, the "G" indicates Karlsruhe and the "J" indicates Hamburg. The coins were made with bronze, brass-plate, nickel and copper.
After World War II, the German States, also known as Deatscher Länder, minted its own coins until the Bundes Republik took over. For this reason, many early issues are unique and valuable. Around 1950, when the country began to settle down, the mint was more widely distributed and therefore less valuable.