Of course I buy all my albums...
Though, I do use Kazaa to download some sample songs to see if I like an artist or not (forgive me Opeth). Then if I like them I'll go out and get the album and if I like them enough I'll continue to get the albums. And if I absolutely become addicted to it with a passion I'll go and buy extra copies of either one or all and put them away in case of that unfortunate day the original CD gets screwed (like I did with Opeth, Iced Earth, and Mastodon)
Actually I got into heavy metal because of Opeth, I used to think very poorly of metal back then and thought that what I listened to was the only music period (I was into to alternative rock and all that simple trendy crap, something that I look back on and think about putting a nine millimeter in my head for doing, but thank God I've been set on the path to salvation...) Blackwater Park was my very first metal album (I downloaded one or two songs to see what their other albums sounded like after that,). I had no clue who these guys were or what they were about, I thought they were kind of dark and were in the mainstream rock genre. When I got into my car and played it, it just killed me how I could be so blind and stupid to the world of such complexity and dark brutality and realized just how much I was in a small world of absolute inane delusions. I loved the hell out of it! after that I kind of stuck with the alternaitve rock for a week or two (slow transition because I was still attatched to the sterotype and stigma of metal that I had that kept me away from it in the first place), but alt rock and shit just got too boring and redundant, especially after I heard Opeth I wanted more metal. So I trashed all my rock CD's and hit the metal section of my local record store. And I have discovered music I never thought I could enjoy or existed! But it has opened my eyes. Anyway sorry about the long rant, yes I purchased all 7 Opeth CD's plus the Lamentations DVD and am trying to get a hold of some vynl records, though not even close to any recognizable success there...