Home Depot offers tiered savings on select appliance purchases, with discounts starting at an extra $25 off purchases of $396 or more, to as much as an extra $1,000 off orders of $5,996 or more. (Discount is applied in-cart and stacks with already discounted prices.) Plus, all orders qualify for free shipping. That's the first time we've seen this particular sale since March, and it yields strong discounts, especially considering free haul-away of your old appliance is also included.
A best bet is the Frigidaire Gallery 19.8-Cubic Foot Chest Freezer in White (pictured), model no. FGCH20M7LW, for $608 before in-cart discounts, $558 with free shipping after. That's the lowest total price we could find by $41. It features exterior temperature controls, sliding baskets, safety lock with pop-out key, and defrost water drain.