The first three or four on SACD are good. The others are mostly crap in my opinion. They may be purchased here for 6.99.
http://www.yourmusic.com/browse/discography/1057.html?search_text=ARTIST:elton%20john
http://www.yourmusic.com/browse/discography/1057.html?search_text=ARTIST:elton%20john