I'll just echo what most other people have said; to have a quick listen to the tracks it's entirely reasonable to download an MP3 from somewhere but nothing quite rivals having a hard copy like a CD or better yet a vinyl.
The idea of collectors uploading out-of-press and highly rare tracks might seem like watering down the rarity to some people but anyone that's into the music will know that having a finite bitrate copy of the track on your hard drive is a completely different kettle of fish to actually owning the track and being able to listen to it on a decent hifi setup.
Plus, giving those of us who aren't strictly collectors a taste of what lies within the world of record collecting can only really benefit in the long run because it means more people will want to go out and look for physical copies of these records and will have a rough idea what sort of names and keywords to look out for.
Overall, MP3 blogs - good, resulting lethargy and sense of ownership because of a little MP3 file on a computer in some people - bad
(I'm twenty)
