Sanabria was a dealer, auctioneer, and cataloguer of air mail stamps and air mailpostalhistory of the world. He issued his first catalog in 1936, called “Standard Catalog of Airpost Stamps,” after acquiring rights from the Scott Stamp and Coin Company. He later renamed the catalog, in 1940, “Sanabria's Airpost Catalogue.” The catalog became the world standard for listing of airpost postage stamps. He died in 1945 while working on a revised 1946 Sanabria catalog.