You are purchasing a used se-tenent set of 4, #1779-82 American Architecture stamps, off paper.  The scan is a sample.   The stamps include:  Virginia Rotunda, by Thomas Jefferson, Baltimore Cathedral, by Benjamin Latrobe, Boston State House, by Charles Bullfinch and Philadelphia Exchange, by William Strickland.  Shipping is $.68 within the United States, outside the United States is $1.55.  I do combine items to save on shipping costs, I only make adjustments for weight changes so you can sometimes put several together and it has no impact on shipping costs.  Thanks!