The Official Bootleg Series are produced by Mike Portnoy and John Petrucci and sold by YtseJam Records. There are hundreds of counterfeits out there so it is best to buy them only from YJR.
When Dream and Day Unite Demos 1987-1989
Images and Words Demos 1989-1991
Images and Words demos (pirate)
Los Angeles, California, 18 May 1998
Old Bridge, New Jersey, 14 December 1996
Bucharest, Romania 4 July 2002 DVD