Hello all, I recently purchased the M600 (it‘s a beast btw) and went on the website today to do some quick research and spotted the info on a rebate. Seems that if you purchase a M600 in May, June or July of 2021 you qualify for a $75 rebate. You have to register your robot and enter the rebate code during the registration process. Other Dolphins offer rebates as well from $25 up to $75. Just go to Rebates and Promotions - Maytronics and check it out. Not sure if somebody else posted about this, if they did my apologies.