If one thought that it was too expensive, they can opt for cheaper female slaves for a price ranging from ten gold to more than a hundred gold. With 1000 gold, one could have bought more than ten slaves.
The cheapest slaves were the coolies, who were either Beastmen or Half Beastmen used for mine digging or manual labour.
These coolies were not sold separately but sold per cages.
One cage of 100 slaves, just for 500 gold.