If I was in any doubt regarding the authenticity of this particular bottle I would contact Glen Moray directly at:
Personally, I think this is a big fake. If Glen Moray would like to make a special bottling for the opening of Buchanan Galleries I'm sure they would do it properly, i.e. putting on a real Glen Moray label and not use a standard 12y. old whisky for the purpose.
Second, this eBay seller has no track record whatsoever and that is a real cause for alarm these days.
More suspicious is that you can't find a single trace of any similar bottles in any collections when searching the web.
I would definitely keep my hands off this bottling.