I have had a pair of these stands listed on ebay UK for nearly a year, without even an enquiry, having had to stop using them due to rearrangements.
I had hoped to recoup a decent part of the pretty substantial cost of them, but I think that it is time to face reality and accept that it ain’t happening! I don’t want them cluttering up the garage indefinitely, so I have to do something else to shift them.
So for forum members only, they are free to anybody who will give them a good home, provided you either collect or arrange collection by a carrier. I don’t mind packing them for you.
They are particularly effective on suspended timber floors.
Everything I can think of to tell you about them is already on the ebay listing linked below, but feel free to PM me if you have any queries.