This is probably slightly old, but the offer still stands. Relapse Records is having a sale in honor of Maryland Deathfest 2009 online. All performing Relapse titles are 20% off. That includes Misery Index, Atheist, Brutal Truth, Pig Destroyer, Cephalic Carnage, and more.
All performing non-Relapse titles are 15% off. This includes bands such as General Surgery, Napalm Death, Cattle Decapitation, and Bolt Thrower.
If you actually buy music, you need to hit this offer up.