Walmart offers the Hawk 25-Foot 4mm Braid Hoist Rope in Black/Grey for $3.90. Choose in-store pickup to avoid the $5.99 shipping fee. Outside of the seller below, it's the lowest price we could find by $6. It supports up to 50 lbs. and includes a carabiner.

A close price, Cabela's offers it for $4.99 with in-store pickup.