Thanks everyone for your help and opinions. They proved to be invaluable (well, I guess in this case there was a very SPECIFIC value). I worked things out amicably with the sellers. It turned out to be an honest mistake. We negotiated a new price that made me satisfied.
So far, really happy with the new trailer. Can't wait for it's Maiden Voyage.
Hope to continue to gain all the knowledge that can come out of this forum, and maybe someday I can lend some wisdom as well.