Here's a breakdown:
* Comprar: To buy
* te: You (informal, singular)
* los: Them
So, "Comprártelos" literally translates to "To buy them for you."
It's important to note that the "te" in "Comprártelos" indicates that the action of buying is being done for the person being addressed.
Example:
"¿Quieres que te compre estos zapatos?"
(Do you want me to buy you these shoes?)
Answer:
"Sí, por favor, cómpratelos!"
(Yes, please, buy them for me!)