RPMs found at mass Retail (Wal Mart) in Bellingham, MA RPMs = Robot Powered Machines. Found these at an endcap half full at WalMart today, have not seen these yet, if this has been reported, please delete. They were $3.46 each or so. Great price, IMO (can't find the Receipt, but, I assure you it was retail.) I did a quick review on YouTube: .