It could happen again, a mad rush to grab a stockpile of Forever Stamps before the price goes up! According to WGRZ,

"The U.S. Postal service proposed a price increase of 5 cents back in the fall."

If passed, the price of the Forever Stamp will move to 55 cents. When the Forever Stamp first came onto the scene in 2007 the stamps were 41 cents! They jumped to 49 and briefly down to 47 before jumping back to 49. As the years go by the price has gone up but the principle stays the same. Once you have one of these stamps they are good Forever.

If the U.S. Postal Service'spropaosl is passed, the increase will go into effect on January 27, 2019.