This is where I usually pick up all of my CDs. Most of the single CDs will be $10.99 even the new releases, and some are even less. The only problem with this store is that if an item is popular they do sell out quick. There are 3 locations in New York, that I know of, and they also have a website: www.discorama.com. There are two locations on West 4th Street near 6th Ave, within two blocks of each other, and a location on Union Square East. Each store is a bit different regarding this music they specialize in. The location on West 4th, East of 6th avenue, definitely carries used CDs as does the location in Union Square, not too sure about the location west of 6th Ave on West 4th Street (Main Store) . Happy hunting!!
It should also be noted that the store on West 4th, East of 6th Ave, also offers a discount to NYU students, probably due to their proximity to the NYU campus.