When I bought an ATV in 2006 I was desperate for a trailer fast. I called all the local joints because "real" trailer sellers needed several days to get in the right trailer. I ended up going to Tractor Supply Company and buying a 5x8 rear gate utility trailer with 13" rims for $699. Most of the others only had 12" rims and there's a big difference.
The first week I had it I went and bought treated 2x6s and put a wood floor in it. So in the end I spent more than I would have for a trailer from a "real" utility trailer company (mine is Carry-On) but it's worked fine for almost 2 years and still looks as new as the day I brought it home.
Here's a pic of it with my old ATV (bought a different one since). We utilized our space excessively well for rednecks.
My new ATV can be SEEN HERE