Your temperament is commendable!
I hope you find a buyer that can bring the trailer back to life.
Your lower Craigslist price may help, though the asking price is not, and never was of interest to me.
It seems to be a battle that cannot be won, but one last shot and I will retreat...
You continue to state;
she is in terrific shape and in very solid condition both cosmetically and structurally.
You even offer this photo of the skin separated from the body.
<img src="http://img32.imageshack.us/img32/6978/trailer026l.jpg">
The point that you seem to ignore is that for the skin to separate, the screws must loose their holding power.
For this to happen the structural wood to which they are attached must be so weak that it cannot hold them.
This means the trailer is NOT structurally sound.
You place great importance on the age/rarity of the trailer.
Both are nice, but don't make up for structural damage.
It is what it is.
Once again, I wish you well, and hope you get your asking price, but ask that you consider representing the
actual condition of the trailer.
If it is as rare and desirable as you state, the right buyer will gladly accept the challenge of rebuilding it, including replacing damaged framing.
Sincere Regards.
Rob
Waiting for "someday" will leave you on your deathbed wondering why you didn't just rearrange your priorities and enjoy the time you had, instead of waiting for a "better" time to come along...