Iron Maiden. HMV had a "2 for £10" deal going on, so I bought all the albums I didn't already own. Turns out Maiden have released a fuck of a lot of albums. Cost me about 60 quid... and some of 'em aren't all that good. Anyway, if you search the bittorrent networks, you can get hold of a cracking mp3 of their Download set at Donington this year. It's 175 megs, but well worth it.
If you go here: ironmaiden.rockmetal.art.pl/download.html you can download a 1995 show (Gothenburg, Sweden) from the Blaze Bayley years (it's much better than you might imagine). The second show listed on the site (live in the USA, 1982) is dead links, though.