The prophet once traded two black slaves for an Arab. Your worth meeshas ka fiirso
Jabir (Allah be pleased with him) reported: There came a slave and pledged allegiance to Allah's Apostle (may peace be upon him) on migration; he (the Holy Prophet) did not know that he was a slave. Then there came his master and demanded him back, whereupon Allah's Apostle (may peace be upon him) said: Sell him to me. And he bought him for two black slaves, and he did not afterwards take allegiance from anyone until he had asked him whether he was a slave (or a free man)
You idiot, it wasn't due to the ethnicity of the slaves. One slave wanted to become Muslim and he pledged alleigence so the prophet (SAW) traded him for two non-Muslim slaves.
Your failing.