Although 'ABBA Gold' has fallen from No.67 to No.73, (UK), this Week, it has actually sold more than it did last Week. It sold around 1,260 copies to be at No.67 & it has sold around 1,420 copies to be at No.73.
If it can keep up its average UK Weekly Sales, it looks like it will sell at least 60,000 to 70,000 UK copies by the end of 2017.
It's quite amazing, but also quite nice, that that many people are still buying it after 25 years. No chance of it getting any closer to Queen's Greatest Hits' sales, though, as that is higher in the chart than ABBA Gold.
Gary - You have to remember that 'Greatest Hits', (1981), by Queen has not really sold 6,180,000 UK copies. It is credited with that Total, but they consist of Sales from 2 other UK Queen releases - not just those of the 17 Track 1981 Album.
In 2006 The Official UK Charts Company allowed the 1981 'Greatest Hits' Album to have 66,000 Sales added in from a 1994 Double Queen CD and 560,000 Sales added in from a 2000 Triple Queen CD - 'The Platinum Collection'.
So, to find out the real -stand-alone - UK Sales of the 1981 'Greatest Hits' Album, you have to remove 626,000 Sales from it - as those 626,000 are from 2 other Queen releases.
6,180,000 - 626,000 is 5,554,000. So, the 1981 Album has sold 5,554,000 UK copies - not 6,180,000.
'ABBA Gold' has sold around 5,400,000 UK copies - so far. So the 1981 Queen Album is 'only' around 154,000 ahead of 'ABBA Gold'. Not the ridiculous 780,000 Sales ahead of 'ABBA Gold', that you get, if you say that the 1981 Queen 'Greatest Hits' Album is on 6,180,000 UK Sales.
Gary - I'm sorry that I misunderstood the point, that you were making, about 'Greatest Hits' by Queen. Although both the Queen & ABBA Compilations have been in the Top 100 for several Weeks, this Year, you are right - the Queen Album is almost always higher in the UK Top 100 than 'ABBA Gold'.
In the latest UK Album Chart, (W/E 25th May 2017), 'ABBA Gold' has risen from No.73 to No.65. It sold about 1,450 copies, to do that. 'Greatest Hits' by Queen, has risen from No.64 to No.59. That sold about 1,580 copies, to do that. So, the Weekly Sales between both Albums are not very far apart - just 130 more Queen Sales - than ABBA - this Week.....