: Websites like eBay and local marketplaces like Avito are the most common sources for pre-owned or refurbished units.

The is a classic robot vacuum from the 700 series, known for introducing high-end features like touch controls and HEPA filtration to the Roomba lineup. While it was once a flagship model, it is now largely discontinued and primarily available through second-hand markets or as refurbished stock. Where to Buy

Because the 780 is an older model, finding it brand new at major retailers is rare. You can typically find it through these channels:

If you are considering a used unit, these are the standout capabilities that defined this model: