I have the White DEMO, Yellow Stock Copy and the Official Re-issue.
The White DEMO and Yellow Stock Copy were from Soul Bowl.
Most records that I bought were in Excellent to Mint condition
but the Yellow Stock Copy although it plays OK is of a lesser grade.
It looks to have been well played and not from a Warehouse find or Radio Station source.
(The name of the previous owner written on the label)
I suspect that it may well have been more difficult to find the Yellow Stock Copy in any quantity and in pristine condition.
It made me think that the Yellow Stock Copy was perhaps the rare one.
Now we have the internet, that position may have changed from copies now available and purchased at the time it was released.