After their battle with Napster our friends in Metallica now does anything to please their fans - except releasing good new material... but the live shows from the good old days still sound great!
Over at LiveMetallica.com - their webstore for official live recordings - they offer tons of shows for download. While most of them only are available for buying, they currently offer 17 shows from 1982-2003 as free downloads.
Some of the highlights:
18.10.1982 Old Waldorf, San Francisco, CA
18.12.1983 Agora Ballroom, Cleveland, OH
15.03.1985 Kabuki Theater, San Francisco, CA
24.05.1986 Arena Building, Cape Girardeau, MO
29.07.1986 UTC Arena, Chattanooga, TN
21.09.1986 Hammersmith Odeon, London, UK
You'll have to register - free - to download the shows.