Finally, if you’re *really* looking to invest in a top-of-the-line Roomba, you won’t want to miss $400 off iRobot's most powerful model yet. It has a four-stage cleaning system that allows you to choose between vacuuming, mopping or combo both.

The iRobot Roomba Combo i5+ is a self-emptying robot vacuum and mop, and it’s currently available at an impressive discount of 46%, bringing the price down to $299 from its original list price of $549.

Head to Amazon right now and you can hoover up the Roomba Essential robot vacuum for $149 (was $249.99), or the combo vacuum-mop version for just $159 (was $274.99). That's 40% and 42% off respectively, and the lowest prices we've seen for both models – and these are ridiculously cheap prices for Roomba vacs.