Trailers seem to be high dollar right now. We are wanting a 16 ft stock trailer (gooseneck) and you wouldn't believe some of the prices on those things!
We looked at one, needed all 4 tires replaced IMMEDIATLEY (showing steel) and needed floor replaced, had no tarp on top and they still wanted 2500 for it
We gave I think 4000 for our trailer, it was a 2 horse slant load, but the slant comes out and fits 3.... had living area up front with air on top. I like it, but it's a pain for pulling around here just to go trail ride....
Check trailerworld too... find some decent deals on there sometimes too. Oh, and kijiji (off shoot of craigslist)