I fear that the reason there is no mention of an exemption for antiques is that there will not be one.
What a fecking joke eBay has become!
So how exactly will they stop people logging into the .com site and buying anything they want from US users or for that matter the myriad of cheap truly offensive 'knives' that chinese sellers will of course still be listing?
No, the only people this will hurt are the UK collectors.