Harbor freight has this trailer on sale for $240.00. With the 20% discount we downloaded of their site, we got it for right at $200.00. With a little ingenuity, wouldn't be hard to put a top on it. This is in store and not off their website. It's $330.00 plus $100.00 shipping from the website.
http://www.harborfreight.com/800-lb-cap ... -2948.html
If the link doesn't work, it's item number 2948.

We bought the tent part of this camper and was going to build the trailer for it. Then someone told me that this trailer was just the right size for it. So for right around $1100.00, we should have a pretty nice camper.
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