I recently sold by perfect Blizzard MkIV '030/50Mhz to Amiga Deals (amigadeals.co.uk).
He still has it available at a rather high £99. But what I can say is that it is in perfect order (or at least was when I sold it) and it comes fully boxed with the original packaging and instruction manual. I think he also offers a 3 month (or is it 30day) warranty.