There is 1 very important reason for why you should never buy a Kangen Machine from a site that isn't Enagic: you may have it recalled from you.
When people sell their machines on eBay, Facebook etc. you have no guarantee that the person finished paying the Enagic-Payments on their product.
You have to send your machine in to Enagic every 1-2 years for a deep clean. During this process the serial number is checked. If your machine has been marked as 'bought but not paid for' Enagic will recall that product and you will be left out of pocket.
Enagic provides a warranty with each machine, this will be void if you aren't the registered owner.
Enagic offer a 5 year Warranty and will replace any part as part of the cleaning and maintenance service. All of this is void if you buy from eBay.
On top of this, even if the person you're buying from has purchased out right you have no way of knowing how that machine has been treated up until the point you considered buying.
And lastly, when you eventually have somebody interested in buying a Kangen Machine you won't be able to sell them one and earn commission on that sale because you were not the original purchaser of the product and it isn't registered in your name.
We highly recommend saving up for a little longer and purchasing your machine yourself so that you can have total faith it is yours forever, you can be the one to take great care of it and you can go on to make commission if you recommend the products to anybody else moving forwards.