I buy about 10 CD's a month. Since january though i've averaged double that. Which is... i dunno, 400 dollars a month on CD's so far this year?
Other music related purchases include quite an assload of audio gear. I updated some things this year, including a 2000 dollar reciver/amp, a 500 dollar set of paradigm speakers to use as rear surrounds in my 7.1 setup, a 500 dollar DVD player, and a 300 dollar 5 CD changer. OH, and an insane amount on cabling. About 300 dollars to setup the 7.1 in my new place, and a 300 dollar coax cable for the CD player, plus a 250 dollar HDMI cable for the DVD player.