Have youtried looking at these from Harbor Freight:
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=5002
I got one and it's a pretty good trailer. I figured new at
$300 wa better than what I could get used. I upgraded the
8" wheels with 12" ones from Pep Boys for $23 each.
I also added a winch. It's a pretty tight little trailer.