The price of a first-class stamp is set to jump again next month, meaning you might want to stock up on Forever stamps now. On May 11, a first-class stamp will go up by 2 cents to 44 cents. Other rates are set to rise as well. The post office adjusts rates each May, but any increases must be at or below the rate of inflation under a 2006 law. Still, there have been more price hikes – six …
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