On the Marshall forum, the few guys that REALLY know their vintage circuits will not agree. They aren't suggesting Emerald is crooked; but they do say they are less than totally honest about their vintage Marshalls.
Which is probably why they won't post gut shots, because most savvy vintage Marshall buyers will immediately post those on the Marshall or Metro or wherever to get a good assessment.
68s can run as much as 20k for a perfect condition, 12 series ala EVH. Kinda crazy, since that's what a 65/66 will cost but the EVH upcharge lol