I just moved in to a WONDERFUL new apartment a few weeks ago, way uptown in Manhattan. I love my room, (hardwood floors, SPACE, which is a luxury in this city, two windows) but it came unfurnished, and since I don't have a steady job yet, I decided to buy most of my furniture used. I also thought it would be a nice thing to do to the environment.
I got a full-sized mattress from a friend of mine (I haven't had a full-size for 2 years!), I bought a boxspring, bedframe, and a dresser used off of craigslist and picked them up when I rented a van at the beginning of the month. The used bookshelf I bought at the same time, though, just didn't cut it, so I kept looking on craigslist.
Last Saturday, I found one of those oldschool ikea bookshelves for sale on craigslist, one with four independent shelves, held together by a metal frame. It was black wood and exactly what I wanted! I e-mailed the guy, requesting to buy it, and then continued unpacking while I waited for him to e-mail me back.