Jack, I respectfully disagree with your view on this issue. There was no need for Ed to apologize. He did nothing wrong.
Unless the plant is riddled with signs or FMV or the cutting comes from said plant, what is the seller to tell you? As Ed stated, the rdb he sold you came from a vigorous healthy mother tree without signs of disease. Should he have disclosed that 5 or 10 years ago when he first grew the original cutting it may have had some indication of carrying the virus? What if he never noticed any signs of the virus in the original scion? There are endless scenarios and permeations that could be imagined here.
I personally received cuttings from Ed's rdb two years ago that never have shown signs of FMV. They are now 3-4 feet tall vigorous trees starting to fruit. I just recently swapped an air layered plant from it with another member without any type of disclosure. Do I owe the recipient an apology?
As almost everyone has stated, FMV comes with the territory so it is best to assume it is present at some level in any and all fig trees.
"My desire for private sales is what most professional growers and sellers in general do when selling anything is make the buyers aware of any issues."
I am not aware of any professional nursery specifically making buyers aware of FMV. Encanto does have a legal sounding disclosure (below). Would something like that have fulfilled your requirements?
"If you are interested in fig trees, you must be aware that we have an extensive collection of varieties. As a result of their many places of origin, including USDA/UC Davis, they have all been exposed to Fig Mosaic Virus (FMV) and most likely are infected with it (though not all exhibit symptoms). Some of our varieties have come from the finest sources in the country, and they have been similarly infected. We do not consider this to be a problem and the United States Department of Agriculture agrees, noting that it is “ubiquitous” even in many wild populations of trees. But we understand that some people are concerned. It is not possible to have a collection of this size and not have FMV, just as it is not possible to obtain most of these varieties from uninfected sources. If this is of concern to you, you will probably want to refrain from purchasing. We have used names for all of the figs which they had when we received them, unless they were unmistakably mislabeled. The pictures at Figs 4 Fun will serve to identify them as what they actually are here in San Diego (given the difference of climates, soil, fertilizer, caprification, etc. "your results will vary"). Again, hopefully this is full disclosure."
Frank....