The flip side is that it is quite common and people are tired of inflated prices and just want to pay a reasonable price for it.
I have no idea about Italian medals, so I suppose it could go either way. I know I've seen dirt-common Canadian medals on ebay (CVSM without ribbon, anyone?) marked up into the stratosphere and I emailed the vendor just to do him the courtesy of telling him he was wasting money on listing fees if he thought what he had was worth 500 bucks, or whatever it was.
There are several Italian army forums out there - mostly in Italian - that I referenced when researching my own page on Italian wartime decorations. May have some luck there if you haven't already tried them. I think Gruppo Supremo was one of them?