Sam's Club offers its members the LG Top Control Smart Wi-Fi Enabled Dishwasher for $597 with free shipping. (Non-members pay $59.70 more, so it's best to buy a 1-year membership for $45.) That's the lowest price we could find by $118. It features three racks, four spray arms, LED display, and links to your smartphone to get notifications when a cycle is complete.

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