ImmortalYawn / Land.Of.Nod.

Artist – Certified Units in Millions
BEATLES, THE 170
BROOKS, GARTH 128
PRESLEY, ELVIS 120
LED ZEPPELIN 111.5
EAGLES 100
JOEL, BILLY 79.5
PINK FLOYD 74.5
STREISAND, BARBRA 71
AC/DC 71
JOHN, ELTON 70
STRAIT, GEORGE 68.5
JACKSON, MICHAEL 67.5
AEROSMITH 66.5
ROLLING STONES, THE 66
SPRINGSTEEN, BRUCE 64
MADONNA 63.5
CAREY, MARIAH 62.5
METALLICA 58
VAN HALEN 56.5
HOUSTON, WHITNEY 54.5

Source:
RIAA Gold and Platinum Artists as of November 2009