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  Buying a Budget Robot Vacuum While more expensive machines can better handle dirt clumps and pet hair, budget models are able to do a decent job. Review the specifications of the machine to determine dirt storage and clearance. Also, check if it can be connected to a home assistant such as Alexa. The midrange Dreametech D10 Plus is one of the few bots that mops, maps and auto-empties for under $400. Its tank-like tires are able to navigate around obstacle