I would go by the prices listed here on HTW.... There's no "Blue Book" or "NADA" usred trailer price list. Here's some examples of trailers for sale on this site.

http://www.horsetrailerworld.com/home/trailerdetail.asp?ID=178087

http://www.horsetrailerworld.com/home/trailerdetail.asp?ID=176261

http://www.horsetrailerworld.com/home/trailerdetail.asp?ID=174649

http://www.horsetrailerworld.com/home/trailerdetail.asp?ID=173737

http://www.horsetrailerworld.com/home/trailerdetail.asp?ID=170137

http://www.horsetrailerworld.com/home/trailerdetail.asp?ID=144835

I have a 2001, 2033MA, 3 horse 7' straight wall DR with a 4' short wall mid tack. Had Silver Star been is business last December, I would probably have a 6 horse head to head Silver Star.

Look around and compare, trailer shopping is turning more to being a buyers market........ Pick a price, make an offer, stick to it and the seller may just come to you.... I would imagine that trailer sales are S-L-O-W