Walmart offers the Territory 60" Double Braided Rope Leash in Black for $4.31 $3.49. Choose in-store pickup to avoid the $5.99 shipping fee. That's the lowest price we could find by $5, outside of the mention below. It's ideal for dogs over 50 lbs.

With orders of $25 or more, Amazon offers it in select colors for about the same price, although stock is limited.