I just ran across this list. Not sure how old it is.
Castoffs and Cutouts: The Top 50 Most Common Used Cds
It was quite an undertaking, but it's finally complete: a virtual flip through the used bins of your local record store. I've ranked the discs according to commonness, although, naturally, questions of volume and locale weigh heavily against how accurate I could really be here, so in aid of making it a more worthwhile guide, I disqualified all but a select few egregious and relevant examples from the the former class. You will not find Matchbox 20's Yourself or Someone Like You atop this list, though it is unquestionably the most widely available used compact disc in America as of this writing.
There's a dual benefit to ignoring platinum titles: I don't have to write about piece of shit records like Hootie & The Blowfish's Fairweather Johnson, Third Eye Blind's Blue, or Bush's Sixteen Stone. Grunge has been dead since the age of Collective Soul and Candlebox-- thousands of copies of Badmotorfinger sold back by aging yuppies sit in dusty piles as proof-- but beyond questions of aesthetics and scope, I think it'd be an insult to our readership if I presumed you needed any help avoiding The Cranberries, Toad the Wet Sprocket and Live. Dada, though...
[Editor's Note: Each disc is accompanied by a colored price tag-- red, yellow, green-- to signify its level of recommendation.]
http://pitchforkmedia.com/features/castoffs-and-cutouts/