Walmart.com has a pretty good price on a folding dolly. It's on sale, and there's a $5 Walmart savings coupon available. Regularly $69.99, after all offers and deals are applied, it's just $38.99.
This is an online-only deal and does qualify for free shipping since it's over $35. However, if you're someone who is constantly adding additional items to your cart to reach the threshold, I recommend taking a look at Walmart+.
When you sign up for a Walmart+ membership, you'll get free shipping with no minimum purchase as well as savings on gas, waived Walmart delivery fees on orders of $35 or more, and a free Paramount+ account.
As long as the items you purchase are sold and shipped by Walmart or sold by a third-party but fulfilled by Walmart, you can follow the Walmart return policy.