Some of my favourites:
The Space Ritual by Hawkwind
ELP Live at The Royal Albert Hall 1992 (full version)
ELP Live at the Mar Y Sol Festival '72
Robin Trower Live!
Night After Night by UK
Groundhogs BBC Radio One Live In Concert
Live Dates by Wishbone Ash
Zalvation Live in the 21st Century by SAHB without Alex
Nektar Live in New York, 1 and 2
Budapest Live by Manfred Mann's Earth Band
Live Bursting Out by Jethro Tull
Golden Earring Live
Nutz Live Cutz
Black Country Communion Live Over Europe
On Your Feet or On Your Knees by Blue Oyster Cult
Gamma Live in San Francisco, CA, 13.11.80 (A boot)
Encores by Argent