I was looking at a Heiwa Inoki Suro on Facebook Marketplace. The seller says it needs a new door key, but can freely open the door. I asked if he has a reset key as well and he says this model doesn’t have a reset key. Keep in mind, I’m a total newbie and this question probably has been answered before, but is this true? To my little knowledge, I thought all machines had he door key and the reset key. Thank you for your replies in advance.