The ReBuilding Center is one of my favorite spots. They have everything here (including the kitchen sink!) If I was working on a home renovation project, I would probably live here...but alas. Not really much you can do with a studio apartment.
William Temple House and Rerun are some great places to find fabulously-vintage furniture.
If you have a budget of say, zero dollars, dumpster diving might just be for you! Last weekend I happened to stumble upon this delightful hanging light. After a few Clorox wipes and some hard work, it looks brand new!
If you're not into actually sifting through a dumpster, just keep an eye out when you're walking or driving around town. You never know what you might stumble upon.