I came across a collection of stamps from a local estate. I'm very new to stamps. The collection has some old stamps from 1800's and I'm not sure if they are worth anything. Some are us and some are foreign stamps in binders. I attach one that looks interesting to me since there is so many in the collection I just don't know where to start. This one has Alexandria VA dated Oct. 10 1862.. Any help would be very much appreciated. Thanks.