The Home Depot is currently selling the Ryobi 16" 40V Cordless Lawn Mower (includes a 4ah Battery & Charger) for $199.99
, which is an $80 savings compared to the list price of $279.99, or about roughly 30% off.
Shipping is free.
Prices valid 5/17/18 - 7/4/18 (per Home Depot website)
Highly recommend picking this up sooner than later, as a similar recent promotion for the 18V model at this price quickly sold out. This is a great deal, as they are currently selling their 18V model (with no battery or charger) for the exact same price!
If you have a small/medium size lawn, these mowers are fantastic - no messing with gas or sparkplugs (though I recommend picking up an extra battery or two - lessons learned!)