Forever Stamps currently are being sold for 46 cents.
The Parks stamp went on sale Monday at post offices nationwide and at The Henry Ford, where dozens of people lined up to buy it, and nearby where collectors gathered to get their new stamps and other collectables stamped — or officially "canceled" — by a postal service employee.
Avid collector David Malhalab was one of the first in line to get stamps, pamphlets and other items canceled.
"Today is the Super Bowl or the championship game for stamp collectors," he said, seated at a table surrounded by his various stamped collectibles.
President Barack Obama issued a proclamation that was read at Monday's event by Detroit-area Democratic U.S. Rep. Gary Peters.
"As we mark the 100th anniversary of Rosa Parks' birth, we celebrate the life of a genuine American hero and remind ourselves that although the principle of equality has always been self-evident, it has never been self-executing," the proclamation reads.
"I call upon all Americans to observe this day with appropriate service, community and education programs to honor Rosa Parks' enduring legacy."
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