SOUTH CAROLINA PLANTATIONS: 1_0_120_1randall_hill_photo02

A grave stone with just the first name of Jane shows the passage of time at the slave cemetery at Friendfield Plantation February 17, 2012, in Georgetown, S.C. According to the 1860 census, 273 slaves lived at Friendfield Plantation. The property has ties to Michelle Obama's family in South Carolina. According to plantation employees, Obama's great-great-grandfather, Jim Robinson, was a slave at Friendfield Plantation. In the South Carolina Lowcountry, more than a half-dozen antebellum plantations, which don't change hands often, are for sale. REUTERS/Randall Hill

A grave stone with just the first name of Jane shows the passage of time at the slave cemetery at Friendfield Plantation February 17, 2012, in Georgetown, S.C. According to the 1860 census, 273 slaves lived at Friendfield Plantation. The property has ties to Michelle Obama's family in South Carolina. According to plantation employees, Obama's great-great-grandfather, Jim Robinson, was a slave at Friendfield Plantation. In the South Carolina Lowcountry, more than a half-dozen antebellum plantations, which don't change hands often, are for sale. REUTERS/Randall Hill