I have to disagree. I have found a few "silver label" suits and they have all sold pretty well. As mentioned, they are usually made my M. Greenfield although others have made them. You can tell by the interior tag just like looking at a Isaia, Brioni, Kiton by the interior tag. It shows who made the suit. When in good shape I always pick these up to flip.
My ebayfu is not so strong.
I picked a really nice grey hand tailored one a while back . It was in a popular size (38r). Only Eazy messaged me on it. It ended up being too big for him. Man, I wish it fit me. I thought all M. greenfields had his initials inside and this didn't. Ended up going for $50 shipped on the bay