I'm looking at buying a new Sinn U1 watch which retails (from Sinn's web site) at €2,260, which is just under £2k. The UK retailers sell the same item for £2,315. Or I see several sellers in Germany and Lichtenstein which sell them new with papers for around £1,500 on Chrono24. What's the catch? Would you buy from the Chrono24 sellers?