Do you sell antique American stamps? I have a collection that I might consider auctioning or a direct sale.

Unless you have a world class collection, M.S. Rau probably wouldn't be the best place to try selling them. I am a stamp collector myself and I can recommend The Stamp Center (Dutch Country Auctions) in Wilmington, DE or Regency Superior of St. Louis, MO

While we love stamps, they are not within our expertise and it is unlikely we would be a buyer.