Chrishonduras, No and No buddy. this is very interesting. There is nothing wrong to bring such a good argument like you did even that make this discussion too long and not boring for me.  

 And i hope you understand about the method in this list. We are registered editor, not a user guest. Listen, Harout already explain why ABBA, Julio Iglesias, and Nana Mouskouri could not get their BEST claim figures which reported around 300-400 million by many famous and reliable sources. 

 Beside, actually i've been searching the internet to find the reliable sources which is claim Jackson's sales figures around 400-500 million records (NOT ALBUMS!, understand that this list mentioned about records). But believe me, all the sources only claim between 350 and 750m.  

 If you feel that we need to remove the 750m-figures of him and put only between 350-500 million records. then please, FIND THAT SOURCES by yourself. Do not ask Harout, me, or any other editors to do that for you. 

 Especially to Harout, we need to put our respect to him even sometimes we could not receive his argument.  

 You wanted this list better, then find the best reliable source. all your sources above is not good enough to support your argument.