Woot has a range of Shark robot vacuums, mostly refurbished, starting at $79.99. The Shark Robot Vacuum & Mop Combo is priced at $299.99, down from a $899.99 reference price, and the Shark R-RV2310 Matrix Robot Vacuum is $139.99 against a $449.99 reference price. Several models combine vacuuming and mopping, and some feature self-emptying bases. A 90-day Woot warranty is included with each refurb. This deal ends September 23. Buy Now at Woot! An Amazon Company