Really wish there was a buyable DVD of Gojira's performance @ Vieilles Charrues Festival 2010.
I think my favorite would probably be Hypocrisy Destroys Wacken since I'm pretty sure it's the only actual live album I've got aside from maybe some bonus stuff with a random cd I own. I actually owned it on VHS back in the day too, hahaha.
Iron Maiden - Live after death (The cd, not the DVD performance)
Peter Frampton - Frampton comes alive! (best selling live performance!)
Iron Maiden - Maiden England
Testament - Live at the fillmore
Testament - Live at london
Megadeth - Live in Chile 1995 (bootleg)
Megadeth - Live at the Hammersmith 92' (unofficial I think)