1.) some CDs are discontinued, and unable to get them anymore (one of reason why Linn opened their own store)
2.) from 1. issue, quality problems getting used CD (and some cases they are quite expensive)
3.) I am already getting buried by a pile of CDs already....
If you have not noticed like 90%+ of portable players support lossless format(s), such as ipod, Zune, and so on. Really only some crap players cost less than 40 bucks (wait, even Sansa Clip supports FLAC.) And format change among lossless files have zero degradation effects while mp3 to something else (and vice versa) always bring quality loss.
Well, I think I stick to that russian site for a while, then.