I feel like they'll have to accept a lower offer, looking at the way it's made it really really won't fit any other bikes except a size 50 cross check with the saddle at exactly that height (unless you have a load of meccano maybe)
Nice but given that it fits one particular size of one particular model of bike, requires a specific seatclamp and limits the seat heights that can be used, I doubt it'll sell at any price.
Looks nice but pricey, though I suspect it's quite heavy, and I'm not sure I'd trust a quick release that relied on a single threaded connection.