Many were sold to south American,central American and Carribean countries.
Once while down in some of the Caribbean islands I remarked about the unusual good physiques. The native black tavern owner told me the reason for that is because when the slave ships on their way to the US stopped for provisions they would sell some of the cargo (slaves) to make payment. The buyers would select the best looking males for work and in the case of women, the best for childbearing so as to grow their investment.