MP3Sale looks suspiciously like another site found on the web, MP3Million. The reason for this is that the two sites are mirrors of each other. All that means is that the sites have a different name.
If you're registered with MP3Sale, you can use your login details to access MP3 Million, and if you're already with MP3 Million, you can access the MP3Sale site if you wish.
This may seem a bit pointless, and to be honest, it is! Which site you use is entirely a personal preference seeing as they are the same site, so all you gotta do is pick, do you want to use MP3Sale or MP3Million? Visit the sites to see what I mean when I say they are mirrors!