The listing, 20 x Pre Stamped w/ .49 cent USPS Postage - First Class has ended.
20 x Pre Stamped Envelopes - .49 Cent First Class Rate - #10 (Business) Size White Envelopes. These DO NOT expire but they are not Forever Stamps so if postal rates increase you would have to add the additional postage in the future. I had these pre-stamped from my postage meter and never used them...yes they are official US Postage and are valid just as any other envelope of the same size with a stamp stuck to it. Since this is my postage meter it does say on the indicia "Mailed from zip code 89012" which is simply my zip code and has nothing to do with where the envelope is mailed from...they can be mailed from anywhere in the USA just like a regular stamp. As always, all of my items come with free shipping! Thanks for looking!