Yes, you will waste a lot of time here. Yes, you will buy records you don't need or even really want.
This is because the sheer volume of amazingness will suck you in.
I've found everything from audio recordings of Ntzoke Shange's "For Colored Girls Who Have Considered Suicide When the Rainbow Isn't Enuff" (Broadway play version!) to Yma Sumac recordings to Guts Pie Earshot albums to Dog Faced Hermans stuff to...etc...
I've also DJ'ed around and have found amazing singles here for my collection.
Not the place if you're looking for current releases.