I have done business on this site for quite awhile. Just because my ratings, feedback, and dealings are not public to you doesn’t mean I am a fraud or scamming people. I also do not owe you an explanation for anything involving my business.
If you don't owe anyone any explanation about your “business” then I don't see why you are bitchin' about people being suspicious of your business activity. We see scammers here every day with such business offers.
If the dealings are private, then what's the point of announcing them here?
Be transparent and prove that you are legitimate or quit bitchin'. Simple as that.