Micromat Gold CD Damper

I wonder if anyone here knows about the Micromat Gold CD Microvibrator Damper made by Digital Systems & Solutions a decade or more ago. I have one that was used by my late friend Stan Ricker, but while scratched it is still intact, and presumably worth something, if audiophiles today hold any interest in such an item. I would be quite willing to sell it, but I have no clue as to its possible resale value. Any advice from members who have experience with this product?