To find the monthly payment for a used car that costs $3,200 over a 24-month period without any interest, you would simply divide the total cost by the number of months.
\[ \text{Monthly Payment} = \frac{\text{Total Cost}}{\text{Number of Months}} = \frac{3200}{24} \approx 133.33 \]
Therefore, you would pay approximately $133.33 each month.
If there's interest involved, the calculation would be different and would require additional information about the interest rate.