Have an urge to try the original nautilus, not the mini. Are genuine ones still in circulation? I can only find them on eBay and this is the only one that looks like it might be genuine https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.co.uk/ulk/itm/263734564596. Worth a punt? Do I have any protection should I order from this seller and it turns out to be fake?