As it stands, most of them are currently VHS copies:
1992 VHS of OT (individual, not the boxed set)
1995 VHS of OT (again, individual releases)
1997 VHS of SE fullscreen
1997 VHS of SE widescreen
1999 VHS of TPM bootleg
2000 VHS of TPM fullscreen
2000 VHS of TPM widescreen collectors boxset
and of course
2001 DVD of TPM
2002 DVD of AOTC
2005 DVD of ROTS
2004 DVD boxset of OT
plus, the 2006 GOUT DVD of Star Wars
preservation-wise, i have a set of Editdroid disks and Moth3r's NTSC conversion that i primarily use for watching, plus the 1977 VHS bootleg, and then all the documentaries, TV specials and fan-docs that have been released (basically all of them except for Special Edition Hype and the Episode I hype collection, mostly because i have most of them taped off TV already).