Queen's Record Sales??

Queen are estimated to have sold over 300 million albums worldwide. But does anyone know if that is accurate. Wikipedia says that Queen have sold of 80 million in the countries availabale and artisits like Madonna and Led Zeppelin have sold much more.

madonna selling more!?!??!?!?!?!
this post makes me sad :'((

The 80 or so million wiki says is just the certified sales, most of their sales haven't been recorded, the same with the Beatles. Madonna is more recent so most of her sales should have been recorded.