It now costs 49 cents to send a letter. The price of stamps went up another 3 cents on Sunday, meaning that if you’ve been hoarding Forever stamps since forever ago, you’ve made a pretty good return. At least, that’s what Allan Sloan, Fortune Magazine’s senior editor-at-large, thinks. To listen to Sloan praise the virtues of the exotic financial instrument known as the postage stamp, click the audio player above.