Specialize in licensed metal lapel pins based upon U.S. Postal Service stamps. These stamp pins are great for wearing as jewelry on hats, lapel, or as tie tacs. They are also very collectible as most are no longer being manufactured.
I also sell fine art work by Dorothea Bilder. Right now, mainly her original stone lithographs. Many of this nationally acclaimed artist's lithographs were produced in Brazil.
I have had an ebay store (Pinmans-Stamp-pin-Design-Store) for three years with excellent feedback.