While robot vacuums are quite helpful, they can be rather expensive. If you’ve wanted to try one but you’re reluctant to drop hundreds on a name-brand model, today’s your lucky day. The Lefant M210 robovac is down to $89 at Amazon, an incredible savings on the robot’s list price of $200. It’s rare to see robovacs under $100, especially ones that don’t compromise on performance! Designed with pet owners in mind, the Lefant M210 tackles pet hair and dirt as it operates its effective zigzag cleaning routine. This super-affordable model doesn’t have a brush—it sucks everything up directly—so it av…