SAVE OVER $500: As of May 14, the Mammotion Luba 3 is on sale for $2,099 at Amazon. That's a 20% discount on list price. $2,099 at Amazon $2,608 Save $509 With longer summer days on the way, it's time for some much-needed garden maintenance. But instead of dragging out that bulky, old-fashioned mower you've had stowed away for years, there’s a much easier option these days. The time has come for a robot mower to handle the job for you. And just in time for summer, Amazon has dropped a new discount on the Mammotion Luba 3 . As of May 14, this robot lawn mower is down from $2,608 to $2,099, saving you over $500. And that's not all, because this model comes with a free garage to protect it from the elements. Mashable Deals By signing up, you agree to receive recurring automated SMS marketing messages from Mashable Deals at the number provided. Msg and data rates may apply. Up to 2 messages/day. Reply STOP to opt out, HELP for help. Consent is not a condition of purchase.…