From PathfinderWiki

The Fleshfairs of Katapesh were opened in 4363 AR in Okeno.[1] It is the largest slave market in the area, and possibly the world. The Fleshfairs draw buyers and sellers from all over, looking for expendable servants, shock troops, or manual laborers.[2]

The most common slaves found here are humans, making up half of the total slave population. Halflings are especially popular, however, and raise a high price from customers. Dwarves and elves are rare, as dwarves are notoriously stubborn and rebellious, while elves are considered too frail.[3]