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Hi Roger.
It is hard to put a 'typical' price on your bottle, because they are not common items, but I would have thought that £150 was on the high side. The Chinese bottles seem to fetch £30 - £50, whereas the genuine Old English fetch £150 - £400, depending upon size, quality and condition. I recall seeing a fairly similar Murano bottle sell a couple of years ago for about £65, I think.
Alan