Having been to several second hand furniture places in the US lately it is harder than I am used to from elsewhere (granted I am mostly in commuter/young professional areas which makes things a bit different).
In the UK I would usually go to one of those places and get something nice. After moving house I did that, got a nice cabinet thing, stuck wheels on the bottom and now have a rolling trolley type thing I can plug in anywhere I like (or could before I blew my speakers up and changed them for a surround sound system around my bed)..