I am starting a stamp collection at zazzle.com with customized images of photos I have taken that are good to use for your mail. Zazzle Custom Stamps are real US Postage. Zazzle is an approved vendor of the USPS.
signed photo -- Flags Line photo depicting a line of Puerto Rican flags in a Bronx neighborhood.
signed photo -- A Flower's Beauty photo depicting a rose at a community garden in NYC's Lower East Side.
Visit me at www.zazzle.com/prsuncom
More products will be added soon.
In the meantime, you can visit my other shops at Imagekind, Etsy or Cafepress for more customized products.