I've got...
The widescreen VHS versions from circa 1993.
The Special Edition OT VHS Box Set (silver widescreen one).
The PT DVDs.
The OT DVD Box Set.
The OT DVD separates with bonus O-OT discs.
Various homebrew DVDs of the various OT laserdisc releases.
And a VHS of ANH with the mono soundtrack, which I have put onto DVD myself.
Oh, and ANH on laserdisc (first release on that format, I think) which I picked up from a second hand shop, but haven't got anything to play it on.