Most discs are in the normal $10-$15 range, but they rotate many of their albums through their $5 special offer. At any given time, about 6,000 of their titles are $5 each as long as you buy three or more of those titles. They change these periodically, which makes the offer all that much more fun.
During a recent $5-each buying spree, I bought Celery Moonbeams by the Boatbuilders and The Grass Sun by Water. Both were great, and I'm pretty bummed that neither band has additional albums. (The other two discs I bought were just OK, not worth telling folks to go look for.)
If buying new releases of established artists at $15 is getting you down, you may find it fun to try buying a wad of discount music from CD Baby.