Marcia Williamson has been a successful GTSA – Buenos Aire’s broker since 2013 helping foreign and local buyers get the best price for their properties in which is at times, a difficult market for the uninitiated to transverse. It is not hard to see why when she gets recommendations similar to this one. “It is with enthusiasm and deep appreciation that I write a letter of recommendation for Gateway to South America real estate agent Marcia Williamson.  I interviewed several agents before…