How much US dollars is 5000 pfennigs worth?

Answer 1

Do you mean as collectibles or for their exchange rate?

If you have that many coins you'd need to know their dates and mint marks. In general, 1-pf coins dated 1969 and later are worth more than face value only if they're uncirculated, and coins from 1948 to 1968 are worth more only if they're either uncirculated or nearly so.

As for the exchange rate, at the time these coins were discontinued in 2002, they were worth about 1/2 of a U.S. cent. However, it would be very difficult to exchange them now unless you were at a major bank in Germany.