Slaves from the upper south were trafficked by land and by sea to New Orleans where they were sold at a markup to the cotton and sugar plantation barons of the region.
In the years immediately following the War of 1812, the most active slave markets in the Deep South of the United States were at Algiers, Louisiana, and Natchez, Mississippi.
"[5] A lady of New Orleans wrote that her doubts about the colonization scheme were fueled by the profitability of the slave supply chain that stretched across the South: "But alas!
streets suspended from the tops of the houses across the street a pennon bearing in large letters this inscription—Talbot's Slave Depot—with the lower floor filled with men and women for sale— specimens of them at the doors— and the very high prices which these victims now command — we fear that Virginia and the other exporting States will send down more slaves for Talbot than free men for Liberia.
[2] The New Orleans slave market was closed in 1864 by the United States Army: "By order of Major General Banks, all the 'signs' of the slave-pens or auctions were erased.