The sterling silver stamps promoted by the Postal Savings Credit Card are actually low-grade handicrafts under the banner of stamps. They are money-circling tools launched by those companies. They flooded the market after 2008, so you don't have to listen to what they say about global limits. The specific value is the current precious metal price multiplied by the weight plus the packaging fee, which is its value. Because the collection value is too low, people who really collect will not buy it. If the landlord likes collecting, collecting stamps is more valuable. You can go to the post office for consultation. Don't listen.