Since I'm in the next county over from you - when I needed a trailer I went to Country Boy down in Cumming. I got a new trailer rather than deal with the hassles of overhauling a used up piece and spending more $. I don't know if CB sells used trailers, but I got my new open job for a good price.
I guess if you really wanted a used trailer you could peek at the AJC classified ads.
You need to shop carefully for used stuff, it's usually beat and if it's beat it's potentially dangerous.