There’s no shortage of robot vacuums on Amazon, and there’s certainly no shortage of deals. That said, it’s rare that you see deals as good as these on two of the most popular robot vacuums out there.

Amazon is running a fantastic one-day Gold Box sale on Sunday that slashes two different Deebot robot vacuum models from Ecovacs down to their lowest prices ever — and by a wide margin, we might add. The better of the two deals is on the higher-end model, a pricey premium robot vacuum that can be had today with a massive $350 discount.

The ECOVACS DEEBOT 711S Robotic Vacuum Cleaner is one of the model powerful robot vacuums Ecovacs has ever made, and it’s also packed with smart features. Among them, you’ll find Smart Navi 2.0 Visual Mapping for pinpoint accurate navigation around your home, a special brush system that’s optimized for carpet cleaning, a long-lasting battery with up to 130 minutes of runtime, and a self-charging feature that returns the robot to its charging base when the battery is running low.

Ecovacs’ Deebot 711S retails for $550, but on Sunday only you can snag one for just $199.99.

That’s definitely the deal we would choose between the two available robot vacuums that are on sale today in Amazon’s Gold Box, but the second model is no slouch. It’s the $280 ECOVACS DEEBOT 500 Robotic Vacuum Cleaner, which is on sale today with a 52% discount that drops it to $134.99.

This model has the same app control and scheduling features, the same Alexa and Google Assistant voice control support, and the same obstacle detection and anti-drop features as the pricier 711S. It doesn’t have advanced navigation technology though, and it only has 110 minutes of battery life compared with 130 minutes on the upgraded model. It’s still a terrific robot vacuum though, and it has bever been this affordable before.

Follow @BGRDeals on Twitter to keep up with the latest and greatest deals we find around the web. Prices subject to change without notice and any coupons mentioned above may be available in limited supply. BGR may receive a commission on orders placed through this article, and the retailer may receive certain auditable data for accounting purposes.