Yes, I am a fan of BtVS given than I watched all 144 episodes over 2 months. To cut a long story short, the soundtrack (on 3 CDs released at different points when the series was on TV) finally arrived from Amazon after a few months.
In my opinion, Buffy The Vampire Slayer: The Album (1999 Television Series) [SOUNDTRACK] is really not worth buying except for theme music and "Close Your Eyes", which is played when Buffy murders her boyfriend Angel at the end of Season 2 in order to save the world (so much for "boyfriend"; and yes, Ashlee Simpson can make a song entitled that if she wishes).
Ditto, for Buffy The Vampire Slayer: Radio Sunnydale [SOUNDTRACK] (2003 US Version). A good track is "The Final Fight" - the music for the last episode, when the slayers are somehow kicking all the Ubervamps' butts (a nice plot inconsistency: even though Buffy the veteran slayer had trouble killing a single Ubervamp throughout all of Season 7, in the last episode, other slayers and Giles/Spike/Xander/Dawn had no problems; won't say the same about Anya though...).
The last CD, the infamous Once More, with Feeling (2002) musical soundtrack is pretty good esp. Sarah Michelle Gellar's singing in "Going Through the Motions" and "Walk Through the Fire". A nice addition was not Joss Whedon's wife singing :) but rather "Sacrifice", the track for the Season 5 finale, where Buffy selfishly jumps off the tower to "to save the world" when in reality, she knows she's going to go to heaven instead of her sister (yes, my postmodernist interpretation). Jokes aside, this is probably the best finale in the whole series (it's also the 100th episode by accident).
On the other hand, Season 4 was hopeless and in its final episode, literally nothing happened!
I would really like to see an 8th season, set 10 years after the last, when all the actors are older and can't walk but still have to battle vampires etc. :)