Stamp collecting has been a popular hobby since the 1850s. Because of this, you'll find stacks of stamps in stellar condition at estate sales, in thrift shops, and elsewhere. This is great, because ...

Only once in a dog's age is a real "find" of valuable old stamps and "covers" (envelopes or wrappers) unearthed. Such "finds" are becoming more and more rare as time goes on, but, for this reason, ...