There are used trailers everywhere, so get out and start hunting. Online sources are also good for covering a lot of shopping ground - try web sites like www.rvclassified.com, www.rvtraderonline.com, www.rvtrader.com, www.rv-mart.com and even Ebay. And many dealers advertise online as well.
I am told there are thousands of "FEMA trailers" available for sale now - leftovers from the energency housing provided to last years hurricane victims. FEMA (federal gov't) is selling them off now that many have been vacated. I don't know where they are or how to go about buying up a surplus one, but perhaps some phone calls to government agenices would find out.
