Yeah, every time I see this posted, I get a little mad.
It's awesome they're supporting metal, but metal music buyers tend to buy physical copies of the albums, not digital, and I have no actual evidence to back me up! :)
That said, I randomly did a search for Anthrax and ALL of these albums are $6 or LESS:
Persistence of Time $3.99 (!!!)
Attack of the Killer B's $5.64
The most ironic thing? If you bought the PHYSICAL COPY Persistence of Time for $4, it would be cheaper than the $5.99 MP3-ONLY version! On top of that, you would get the MP3's for FREE on Amazon with the album since Amazon started "AutoRip", which this CD has!