How to buy BNB cheapest?

Could you please elaborate on the most cost-effective way to purchase BNB? I'm interested in understanding the various strategies and platforms available for acquiring BNB at the lowest price possible. Could you provide insights into comparing exchange rates, considering transaction fees, and exploring any potential discounts or promotions that might be available? Additionally, would you recommend any specific timing or market conditions that might favor a cheaper purchase? I'm keen on maximizing my savings while investing in BNB, so your advice would be greatly appreciated.