With artists like Bowie, the number of released albums is a great problem, especially for newbies, I agree. I sometimes find myself buying albums I don't like much, just for a couple of songs, just because I don't have a precise idea (and I find boring listening to dozens of mp3 files before deciding: this way all the excitement for the purchase is lost). Bowie himself has a huge number of very famous tunes and usually people decide to get one of his albums following the knowledge they have of these famous tunes/songs, but sometimes this strategy doesn't work