I am the person who posted the sale. I am pleased that the moderator is checking the posts and advising people to be careful. It is good advice, particularly when it comes to medical devices such as this.
I did try to contact the forum people via their email link to check on the "etiquette" of posting such an ad, but received no response within 48 hours, so decided to post it anyway.
I do OWN this machine outright.
For what it's worth, if any interested parties contact me regarding this item, I will work with them to ensure a safe, secure and courteous transaction, including divulging all of my contact information and offering purchase protection through Paypal or similar service for peace of mind.
Any questions, please feel free to contact me.